**
(trip ##
{vertical mode: \tracingrestores}
{\write}
{blank space  }
{\openout}

! Bad number (-7).
<to be read again> 
                   8
l.94 \openout-'78
                 terminal \openout10=tr\romannumeral1 \gobble\newcs pos
Since I expected to read a number between 0 and 15,
I changed this one to zero.

{\openout}
{\romannumeral}
{\write}
{blank space  }
{\write}
{blank space  }
{\write}
{blank space  }
{\vsize}
{\vbadness}
{\topskip}
{\penalty}
{\maxdepth}
{\tracingoutput}
{\moveleft}
{\moveright}
{restricted horizontal mode: \vrule}
{end-group character }}
{vertical mode: blank space  }
{\penalty}

Completed box being shipped out [0.0.0.0.11]
\vbox(2000.0+2.0)x21.0, glue set 1952.0fil
.\write-{log file only\the \prevgraf }
.\openout0=8terminal
.\openout10=tripos
.\write10{}
.\write10{\uppercase {\number {\outputpenalty }}}
.\write10{[\uppercase {\romannumeral -\the \outputpenalty }[}
.\glue(\topskip) 9.6 plus 1.0fil
.\vbox(10.4+0.0)x-2.0, shifted -20.0
..\rule(0.4+0.0)x*
..\glue 10.0 plus 5.0filll
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+20.0)x1.0, shifted 20.0
..\rule(-19.0+20.0)x1.0

log file only0
\openout0 = `8terminal.tex'.

\openout10 = `tripos.tex'.

{no mode: \number}

! Missing number, treated as zero.
<to be read again> 
                   {
...
l.106 \penalty-10000 
                     % now we'll compute silently for awhile, after default ...
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

{\romannumeral}
{\the}
{vertical mode: \batchmode}

{\output}
{blank space  }
{\setbox}
{internal vertical mode: end-group character }}
{vertical mode: blank space  }
{\dimen}
{begin-group character {}
{\output}
{blank space  }
{\insert}
{internal vertical mode: \def}
{blank space  }
{\vskip}
{\baselineskip}
{\lineskip}
{\vbox}
{end-group character }}
{\penalty}
{\vbox}
{end-group character }}
{\penalty}
{\vbox}
{end-group character }}
{\penalty}
{end-group character }}
! Insertions can only be added to a vbox.
l.125     }
            % since \dimen100=803pt<3*267.7pt, the insertion splits;
Tut tut: You're trying to \insert into a
\box register that now contains an \hbox.
Proceed, and I'll discard its present contents.

The following box has been deleted:
\hbox(7.0+1.0)x2.0
.\rip A

! Infinite glue shrinkage inserted from \skip100.
l.125     }
            % since \dimen100=803pt<3*267.7pt, the insertion splits;
The correction glue for page breaking with insertions
must have finite shrinkability. But you may proceed,
since the offensive shrinkability has been made finite.

{vertical mode: blank space  }
{\topskip}
{\vbox}
{internal vertical mode: end-group character }}
{vertical mode: blank space  }
{\insertpenalties}
{\penalty}
{\cleaders}
{restricted horizontal mode: \lower}
{internal vertical mode: end-group character }}
{restricted horizontal mode: blank space  }
{\leaders}
{\cleaders}
{the letter A}
{end-group character }}
{\leaders}
{the letter A}
{end-group character }}
{\xleaders}
{the letter A}
{end-group character }}
{\write}
{blank space  }
{end-group character }}
{vertical mode: \mark}
{blank space  }
{the letter A}
{horizontal mode: the letter A}
{\insert}
{internal vertical mode: \baselineskip}
{\splittopskip}
{\hbox}
{restricted horizontal mode: \vadjust}
{internal vertical mode: \penalty}
{end-group character }}
{restricted horizontal mode: end-group character }}
{internal vertical mode: \hbox}
{restricted horizontal mode: end-group character }}
{internal vertical mode: end-group character }}
{horizontal mode: \showthe}
> 1050.0pt.
<everypar> ...hbox to -10pt{}}\showthe \pagetotal 
                                                  \showthe \pagegoal \advanc...
...
l.140   A
         AA\everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\showthe}
> 1470.63013pt.
<everypar> ...owthe \pagetotal \showthe \pagegoal 
                                                  \advance \count 15by1\mark...
...
l.140   A
         AA\everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\advance}
{\mark}
{\splitmaxdepth}
{\par}

Overfull \hbox (2.0pt too wide) in paragraph at lines 140--140
[]\rip A|

\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0

{vertical mode: the letter A}
{horizontal mode: the letter A}
{\insert}
{internal vertical mode: \baselineskip}
{\splittopskip}
{\hbox}
{restricted horizontal mode: \vadjust}
{internal vertical mode: \penalty}
{end-group character }}
{restricted horizontal mode: end-group character }}
{internal vertical mode: \hbox}
{restricted horizontal mode: end-group character }}
{internal vertical mode: end-group character }}
{horizontal mode: \showthe}
> 1061.0pt.
<everypar> ...hbox to -10pt{}}\showthe \pagetotal 
                                                  \showthe \pagegoal \advanc...
...
l.140   AA
          A\everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\showthe}
> 1255.43756pt.
<everypar> ...owthe \pagetotal \showthe \pagegoal 
                                                  \advance \count 15by1\mark...
...
l.140   AA
          A\everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\advance}
{\mark}
{\splitmaxdepth}
{\par}

Overfull \hbox (2.0pt too wide) in paragraph at lines 140--140
[]\rip A|

\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0

{vertical mode: the letter A}
{horizontal mode: the letter A}
{\insert}
{internal vertical mode: \baselineskip}
{\splittopskip}
{\hbox}
{restricted horizontal mode: \vadjust}
{internal vertical mode: \penalty}
{end-group character }}
{restricted horizontal mode: end-group character }}
{internal vertical mode: \hbox}
{restricted horizontal mode: end-group character }}
{internal vertical mode: end-group character }}
{horizontal mode: \showthe}
> 1071.0pt.
<everypar> ...hbox to -10pt{}}\showthe \pagetotal 
                                                  \showthe \pagegoal \advanc...
...
l.140   AAA
           \everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\showthe}
> 1055.44061pt.
<everypar> ...owthe \pagetotal \showthe \pagegoal 
                                                  \advance \count 15by1\mark...
...
l.140   AAA
           \everypar=\errhelp % because of previous \everypar, this makes 3 ...


{\advance}
{\mark}
{\splitmaxdepth}
{\par}

Overfull \hbox (2.0pt too wide) in paragraph at lines 140--140
[]\rip A|

\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0

{vertical mode: \everypar}
{\kern}
{the letter A}
{horizontal mode: the letter A}
{\hfill}
{\vadjust}
{internal vertical mode: \newlinechar}
{\special}
{\penalty}
{end-group character }}
{horizontal mode: \penalty}
{the letter A}
{\par}

Overfull \hbox (2.0pt too wide) in paragraph at lines 145--148
[]\rip A|

\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0


Overfull \hbox (2.0pt too wide) in paragraph at lines 145--148
\rip A|

\hbox(7.0+1.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0

{vertical mode: \insert}
{internal vertical mode: \vskip}
{\floatingpenalty}
{end-group character }}
{vertical mode: \pagefilstretch}
{\showthe}
> 952.
l.149 ...agefilstretch-1pt\showthe\insertpenalties
                                                  \penalty99999999\showlists

{\penalty}
{\showlists}

### vertical mode entered at line 0
### current page:
\insert100, natural size 803.09999; split(1.0 plus 43.0,-2.0); float cost 100
.\glue 0.0 plus 1.0fil
.\vbox(267.7+0.0)x0.0
.\penalty -101
.\glue(\lineskip) 0.0 minus 0.4
.\vbox(267.7+0.0)x0.0
.\penalty -100
.\glue(\lineskip) 0.0 minus 0.4
.\vbox(267.7+0.0)x0.0
.\penalty -1000
\glue(\topskip) 0.0 plus 44.0
\vbox(1000.0+0.0)x0.0
\penalty 12345
\cleaders 50.0 minus 10.0
.\hbox(15.0+2.0)x45.0
..\vbox(17.0+0.0)x0.0, shifted 2.0
..\glue 4.0 plus 2.0 minus 1.0
..\leaders 10.0
...\rule(0.4+0.0)x*
..\cleaders 9.0
...\hbox(7.0+1.0)x2.0
....\rip A
..\leaders 9.0
...\hbox(7.0+1.0)x2.0
....\rip A
..\xleaders 9.0
...\hbox(7.0+1.0)x2.0
....\rip A
..\write*{\help }
..\glue 4.0 plus 2.0 minus 1.0
\mark{alpha}
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 3.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\insert200, natural size 400.0; split(0.0,-2.0); float cost 100
.\hbox(0.0+0.0)x0.0
.\penalty 999
.\glue(\baselineskip) 400.0
.\hbox(0.0+0.0)x-10.0
\mark{1}
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\insert200, natural size 400.0; split(1.0,-1.0); float cost 100
.\hbox(0.0+0.0)x0.0
.\penalty 999
.\glue(\baselineskip) 400.0
.\hbox(0.0+0.0)x-10.0
\mark{2}
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\insert200, natural size 400.0; split(2.0,-1.0); float cost 100
.\hbox(0.0+0.0)x0.0
.\penalty 999
.\glue(\baselineskip) 400.0
.\hbox(0.0+0.0)x-10.0
\mark{3}
\kern -50.0
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\glue(\baselineskip) 9.0 plus 41.0
\hbox(0.0+0.0)x0.0
.\penalty -1000000000
.\glue(\rightskip) 0.0
\special{^^80-1000.0pt}
\penalty -5000
\glue(\baselineskip) 3.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\insert200, natural size 10000.0; split(1.0 plus 43.0,-1.0); float cost 3
.\glue 10000.0
\penalty 99999999
total height 1060.0 plus 458.0 plus -1.0fil plus 8.0filll minus 51.0
 goal height 1055.44061
\insert100 adds 535.36987, #1 might split
\insert200 adds 405.19714, #3 might split
prevdepth 1.0, prevgraf 3 lines

! OK.
<recently read> \showlists 
                           
l.149 ...insertpenalties\penalty99999999\showlists
                                                  

{\showthe}
> 8.0pt.
l.150   \showthe\pagefilllstretch
                                 \vskip 1000pt\penalty-333\hbox to 23pt{} % ...


{\vskip}
{\penalty}
! \box255 is not void.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
You shouldn't use \box255 except in \output routines.
Proceed, and I'll discard its present contents.

The following box has been deleted:
\vbox(0.0+0.0)x0.0

{internal vertical mode: \dimen}
{\count}
{\global}
{\ifnum}
{true}
{\global}
{\unvbox}
{\penalty}
{\else}
{\message}
{\topmark}
{\firstmark}
{\botmark}
{\splitfirstmark}
{\splitbotmark}
:alpha:3::
{end-group character }}
! Infinite glue shrinkage inserted from \skip100.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
The correction glue for page breaking with insertions
must have finite shrinkability. But you may proceed,
since the offensive shrinkability has been made finite.

{\dimen}
{\count}
{\global}
{\ifnum}
{false}
{\setbox}
{\shipout}
{restricted horizontal mode: \box}
{\box}
{\vsplit}

Overfull \vbox (986.0pt too high) has occurred while \output is active
\vbox(55.0+-1.0)x45.0, glue set - 1.0
.\glue(\topskip) 0.0 plus 44.0
.\vbox(1000.0+0.0)x0.0
.\penalty 12345
.\cleaders 50.0 minus 10.0
..\hbox(15.0+2.0)x45.0
...\vbox(17.0+0.0)x0.0, shifted 2.0
...\glue 4.0 plus 2.0 minus 1.0
...\leaders 10.0
....\rule(0.4+0.0)x*
...\cleaders 9.0
....\hbox(7.0+1.0)x2.0
.....\rip A
...\leaders 9.0
....\hbox(7.0+1.0)x2.0
.....\rip A
...\xleaders 9.0
....\hbox(7.0+1.0)x2.0
.....\rip A
...\write*{\help }
...\glue 4.0 plus 2.0 minus 1.0
.\mark{alpha}

{end-group character }}

Completed box being shipped out [-5000.0.0.0.11.53110374]
\hbox(810.4+0.0)x45.0
.\vbox(267.7+0.0)x0.0
..\glue 0.0 plus 1.0fil
..\vbox(267.7+0.0)x0.0
.\vbox(810.4+0.0)x0.0
..\rule(0.4+0.0)x*
..\glue 10.0 plus 5.0filll
..\hbox(0.0+0.0)x0.0
..\penalty 999
..\glue(\baselineskip) 400.0
..\hbox(0.0+0.0)x-10.0
..\hbox(0.0+0.0)x0.0
..\penalty 999
..\glue(\baselineskip) 400.0
..\hbox(0.0+0.0)x-10.0
..\hbox(0.0+0.0)x0.0
.\vbox(55.0+-1.0)x45.0, glue set - 1.0
..\glue(\topskip) 0.0 plus 44.0
..\vbox(1000.0+0.0)x0.0
..\penalty 12345
..\cleaders 50.0 minus 10.0
...\hbox(15.0+2.0)x45.0
....\vbox(17.0+0.0)x0.0, shifted 2.0
....\glue 4.0 plus 2.0 minus 1.0
....\leaders 10.0
.....\rule(0.4+0.0)x*
....\cleaders 9.0
.....\hbox(7.0+1.0)x2.0
......\rip A
....\leaders 9.0
.....\hbox(7.0+1.0)x2.0
......\rip A
....\xleaders 9.0
.....\hbox(7.0+1.0)x2.0
......\rip A
....\write*{\help }
....\glue 4.0 plus 2.0 minus 1.0
..\mark{alpha}

{internal vertical mode: blank space  }
{\unvcopy}
{\showlists}

### internal vertical mode entered at line 150 (\output routine)
\glue(\splittopskip) 0.0 plus 43.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\mark{1}
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\mark{2}
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\mark{3}
\kern -50.0
\glue(\parskip) 0.0 plus 42.0 minus 8.0
\glue(\baselineskip) 2.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\hbox(0.0+0.0)x0.0
.\rip A
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\glue(\baselineskip) 9.0 plus 41.0
\hbox(0.0+0.0)x0.0
.\penalty -1000000000
.\glue(\rightskip) 0.0
\special{^^80-1000.0pt}
prevdepth ignored
### vertical mode entered at line 0
### current page: (held over for next output)
\insert100, natural size 535.4; split(1.0 plus 43.0,-2.0); float cost 100
.\glue(\splittopskip) 0.0 plus 43.0
.\vbox(267.7+0.0)x0.0
.\penalty -100
.\glue(\lineskip) 0.0 minus 0.4
.\vbox(267.7+0.0)x0.0
.\penalty -1000
\insert200, natural size 2.0; split(2.0,-1.0); float cost 100
.\glue(\splittopskip) 2.0
.\hbox(0.0+0.0)x-10.0
### recent contributions:
\penalty 10000
\penalty 10000
\glue(\baselineskip) 3.0 plus 41.0
\hbox(7.0+1.0)x0.0
.\rip A
.\penalty 10000
.\glue(\parfillskip) 0.0
.\glue(\rightskip) 0.0
.\rule(*+*)x5.0
\insert200, natural size 10000.0; split(1.0 plus 43.0,-1.0); float cost 3
.\glue 10000.0
\penalty 99999999
\glue 1000.0
\penalty -333
prevdepth 1.0, prevgraf 3 lines

! OK.
<recently read> \showlists 
                           
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 2.
<output> ...5\showlists \showthe \insertpenalties 
                                                  \showthe \pageshrink \glob...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 51.0pt.
<output> ...\insertpenalties \showthe \pageshrink 
                                                  \globaldefs 1\halign {##\t...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\globaldefs}
{\halign}
{blank space  }
{\showboxdepth}
{\showboxbreadth}
{\fi}
{\message}
{\topmark}
{\firstmark}
{\botmark}
{\splitfirstmark}
{\splitbotmark}
3:alpha:3:alpha:alpha
{end-group character }}
! Output routine didn't use all of \box255.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
Your \output commands should empty \box255,
e.g., by saying `\shipout\box255'.
Proceed; I'll discard its present contents.

The following box has been deleted:
\vbox(1055.44061+0.0)x45.0, glue set 0.01305
.\glue(\topskip) 0.0 plus 44.0
.\vbox(1000.0+0.0)x0.0
.etc.

! Infinite glue shrinkage inserted from \skip100.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
The correction glue for page breaking with insertions
must have finite shrinkability. But you may proceed,
since the offensive shrinkability has been made finite.

{\dimen}
{\count}
{\global}
{\ifnum}
{false}
{\setbox}
{\shipout}
{restricted horizontal mode: \box}
{\box}
{\vsplit}
{end-group character }}

Completed box being shipped out [10000.0.0.0.11.131072]
\hbox(535.4+0.0)x0.0
.\vbox(535.4+0.0)x0.0 []
.\vbox(2.0+0.0)x0.0 []
.etc.

{internal vertical mode: blank space  }
{\unvcopy}
{\showlists}

### internal vertical mode entered at line 150 (\output routine)
prevdepth ignored
### vertical mode entered at line 0
### recent contributions:
\glue(\baselineskip) 9.0 plus 41.0
\hbox(0.0+0.0)x0.0
.\penalty -1000000000
.\glue(\rightskip) 0.0
etc.
prevdepth 1.0, prevgraf 3 lines

! OK.
<recently read> \showlists 
                           
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 0.
<output> ...5\showlists \showthe \insertpenalties 
                                                  \showthe \pageshrink \glob...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 33.0pt.
<output> ...\insertpenalties \showthe \pageshrink 
                                                  \globaldefs 1\halign {##\t...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\globaldefs}
{\halign}
{blank space  }
{\showboxdepth}
{\showboxbreadth}
{\fi}
{\message}
{\topmark}
{\firstmark}
{\botmark}
{\splitfirstmark}
{\splitbotmark}
3:1:3:1:3
{end-group character }}
! Output routine didn't use all of \box255.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
Your \output commands should empty \box255,
e.g., by saying `\shipout\box255'.
Proceed; I'll discard its present contents.

The following box has been deleted:
\vbox(924.23029+1.0)x0.0, glue set 3.19875
.\glue(\topskip) 0.0 plus 44.0
.\hbox(7.0+1.0)x0.0 []
.etc.

{\dimen}
{\count}
{\global}
{\ifnum}
{false}
{\setbox}
{\shipout}
{restricted horizontal mode: \box}
{\box}
{\vsplit}

Overfull \vbox (958.0pt too high) has occurred while \output is active
\vbox(55.0+-1.0)x0.0
.\glue(\topskip) 1.0 plus 44.0
.\hbox(0.0+0.0)x0.0 []
.etc.

{end-group character }}

Completed box being shipped out [-333.0.0.0.11.655360000]
\hbox(10000.0+0.0)x0.0
.\vbox(10000.0+0.0)x0.0 []
.\vbox(55.0+-1.0)x0.0 []

{internal vertical mode: blank space  }
{\unvcopy}
{\showlists}

### internal vertical mode entered at line 150 (\output routine)
prevdepth ignored
### vertical mode entered at line 0
### recent contributions:
\penalty 10000
prevdepth 1.0, prevgraf 3 lines

! OK.
<recently read> \showlists 
                           
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 0.
<output> ...5\showlists \showthe \insertpenalties 
                                                  \showthe \pageshrink \glob...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\showthe}
> 0.0pt.
<output> ...\insertpenalties \showthe \pageshrink 
                                                  \globaldefs 1\halign {##\t...
...
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now

{\globaldefs}
{\halign}
{blank space  }
{\showboxdepth}
{\showboxbreadth}
{\fi}
{\message}
{\topmark}
{\firstmark}
{\botmark}
{\splitfirstmark}
{\splitbotmark}
3:3:3::
{end-group character }}
! Output routine didn't use all of \box255.
<to be read again> 
                   \hbox 
l.150 ...illlstretch\vskip 1000pt\penalty-333\hbox
                                                   to 23pt{} % output now
Your \output commands should empty \box255,
e.g., by saying `\shipout\box255'.
Proceed; I'll discard its present contents.

The following box has been deleted:
\vbox(-3010.0+0.0)x0.0
.\glue(\topskip) 1.0 plus 44.0
.\hbox(0.0+0.0)x0.0 []
.etc.

{vertical mode: \hbox}
{restricted horizontal mode: end-group character }}
{vertical mode: blank space  }
{\vsize}
{\global}
! Dimension too large.
l.151 ...t\global\vsize=16383.99999237060546875pt 
                                                  % page size \approx infinity
I can't work with sizes bigger than about 19 feet.
Continue and I'll use the largest value I can.

{end-group character }}
{blank space  }
{begin-group character {}
{\tracingoutput}
{\tracingstats}
{\shipout}
{restricted horizontal mode: \closeout}
{\closeout}
{end-group character }}
[-333.0.0.0.11]
{vertical mode: end-group character }}
{blank space  }
{\showthe}
> A\insert 200{\baselineskip 400pt\splittopskip \count 15pt\hbox {\vadjust {\pe
nalty 999}}\hbox to -10pt{}}\showthe \pagetotal \showthe \pagegoal \advance \co
unt 15by1\mark {\the \count 15}\splitmaxdepth -1pt \paR \gobble .
l.154 \showthe\everypar
                       

{\everypar}
{\showthe}
> .
l.155 \everypar{}\showthe\everypar
                                  

{\def}
{blank space  }
{\tracingmacros}
{\def}
{blank space  }
{\let}
{\dimendef}
{\dimen222}
{\ifdim}
{true}
{\fi}
{\ifdim}

\t 12#101001{->-.#1pt{
#1<-01001010
{true}
{begin-group character {}
{\relax}
{end-group character }}
{\else}
{\count0}
{\ifodd}
{true}
{\advance}
{\fi}
{\penalty}
{internal vertical mode: \tracingcommands}
> -12345.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.164 \penalty -12345 
                      % output the remaining stuff


Completed box being shipped out [-2.0.0.0.11]
\vbox(2000.0+0.0)x23.0, glue set 45.43182
.\glue(\topskip) 1.0 plus 44.0
.\hbox(0.0+0.0)x23.0

{vertical mode: \tracingmacros}
{\adjdemerits}
{\linepenalty}
{\def}
{blank space  }
{\valign}
{horizontal mode: \valign}
{restricted horizontal mode: \spacefactor}
{\global}
{end-group character }}
{blank space  }
{\vrule}
{begin-group character {}
{blank space  }
{end-group character }}
{end-group character }}
{internal vertical mode: \baselineskip}
{\global}
{\global}
{\rightskip}
{\global}
{\setbox}

\1#1->\hbox to#1pt{}
#1<-2
{restricted horizontal mode: end-group character }}
{internal vertical mode: blank space  }
{\noindent}
{horizontal mode: \copy}
{\hskip}
{\copy}
{\hskip}
{\lower}

\1#1->\hbox to#1pt{}
#1<-1
{restricted horizontal mode: end-group character }}
{horizontal mode: \hskip}
{\copy}
{\hskip}
{\box}
{end of alignment template}

Tight \hbox (badness 30) in paragraph at lines 183--183
 [] [] [] 

\hbox(0.0+2.0)x13.0, glue set - 0.66667
.\glue(\leftskip) 4.0
.\hbox(0.0+0.0)x2.0
.etc.


Loose \hbox (badness 30) in paragraph at lines 183--183
 [] [] 

\hbox(0.0+0.0)x13.0, glue set 0.66667
.\glue(\leftskip) 4.0
.\hbox(0.0+0.0)x2.0
.etc.

{internal vertical mode: \baselineskip}
{\global}
{\global}
{\rightskip}
{\global}
{\setbox}

\1#1->\hbox to#1pt{}
#1<-2
{restricted horizontal mode: end-group character }}
{internal vertical mode: blank space  }
{\noindent}
{horizontal mode: \copy}
{\hskip}
{\copy}
{\hskip}
{\lower}

\1#1->\hbox to#1pt{}
#1<-1
{restricted horizontal mode: end-group character }}
{horizontal mode: \hskip}
{\copy}
{\hskip}
{\box}
{\adjdemerits}
{end of alignment template}

Loose \hbox (badness 51) in paragraph at lines 184--184
 [] [] 

\hbox(0.0+0.0)x13.0, glue set 0.8
.\glue(\leftskip) 4.0
.\hbox(0.0+0.0)x2.0
.etc.

{internal vertical mode: \baselineskip}
{\global}
{\global}
{\rightskip}
{\global}
{\setbox}

\1#1->\hbox to#1pt{}
#1<-2
{restricted horizontal mode: end-group character }}
{internal vertical mode: blank space  }
{\noindent}
{horizontal mode: \copy}
{\hskip}
{\copy}
{\hskip}
{\lower}

\1#1->\hbox to#1pt{}
#1<-1
{restricted horizontal mode: end-group character }}
{horizontal mode: \hskip}
{\copy}
{\hskip}
{\box}
{\linepenalty}
{\hbadness}
{end of alignment template}
{restricted horizontal mode: blank space  }
{\spacefactor}
{end-group character }}
{horizontal mode: \message}
1
{blank space  }
{begin-group character {}
{\hsize}
{\par}

Underfull \hbox (badness 10000) in paragraph at lines 171--187
 [] | [][][] 

\hbox(22.0+0.0)x1000.0, glue set 237.5
.\glue(\leftskip) 4.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \parindent}
{\indent}
{horizontal mode: end-group character }}
{\leftskip}
{\def}
{\noindent}
{\indent}
{\hbox}
{restricted horizontal mode: \hskip}
{end-group character }}

Underfull \hbox (badness 10000) detected at line 188
 

\hbox(0.0+0.0)x2.0, glue set -1.99255
.\glue 0.0 plus -1.00374

{horizontal mode: \discretionary}

\?->\vrule width-2pt \hbox spread2pt{}
{restricted horizontal mode: \vrule}
{\hbox}
{end-group character }}
{the letter A}
{end-group character }}

\?->\vrule width-2pt \hbox spread2pt{}
{\vrule}
{\hbox}
{end-group character }}
{the letter B}
{end-group character }}

\?->\vrule width-2pt \hbox spread2pt{}
{\vrule}
{\hbox}
{end-group character }}
{the character /}
{\kern}
{end-group character }}
{horizontal mode: \unkern}
{\showthe}
> 2.0pt.
l.190 \showthe\lastkern
                       \vbox{\hrule width 6pt} \par % should set with nothin...


{\vbox}
{internal vertical mode: \hrule}
{end-group character }}
{horizontal mode: blank space  }
{\par}
{vertical mode: \penalty}
\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -22222.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.191 \penalty-22222 
                     % end of demerits test, hyphenation is next


Completed box being shipped out [-2.0.0.0.11]
\vbox(16383.99998+0.0)x1000.0, glue set 16341.99998fil
.\glue(\topskip) 0.0 plus 1.0fil
.\hbox(22.0+0.0)x1000.0, glue set 237.5
..\glue(\leftskip) 4.0
..\hbox(0.0+0.0)x0.0
..\glue(\xspaceskip) -1.0
..\rule(22.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\vbox(22.0+0.0)x13.0
...\glue(\tabskip) 0.0 plus 40.0
...\vbox(22.0+0.0)x13.0, glue set 2.0
....\hbox(0.0+2.0)x13.0, glue set - 0.66667
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 5.0 minus 1.0
.....\hbox(0.0+0.0)x2.0
.....\glue 5.0 minus 2.0
.....\hbox(0.0+0.0)x1.0, shifted 2.0
.....\glue(\rightskip) -1.0
....\penalty 125
....\glue(\baselineskip) 18.0 plus 1.0
....\hbox(0.0+0.0)x13.0, glue set 0.66667
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 6.0
.....\hbox(0.0+0.0)x2.0
.....\penalty 10000
.....\glue(\parfillskip) 0.0
.....\glue(\rightskip) -1.0
...\glue(\tabskip) 0.0 plus 40.0
..\vbox(22.0+0.0)x13.0
...\glue(\tabskip) 0.0 plus 40.0
...\vbox(22.0+0.0)x13.0
....\hbox(0.0+0.0)x13.0, glue set 0.8
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 5.0 minus 1.0
.....\hbox(0.0+0.0)x2.0
.....\glue(\rightskip) -1.0
....\penalty 125
....\glue(\baselineskip) 20.0 plus 1.0
....\hbox(0.0+2.0)x13.0
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x1.0, shifted 2.0
.....\glue 3.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 6.0
.....\hbox(0.0+0.0)x2.0
.....\penalty 10000
.....\glue(\parfillskip) 0.0
.....\glue(\rightskip) -1.0
...\glue(\tabskip) 0.0 plus 40.0
..\vbox(22.0+0.0)x13.0
...\glue(\tabskip) 0.0 plus 40.0
...\vbox(22.0+0.0)x13.0
....\hbox(0.0+0.0)x13.0, glue set 0.8
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 5.0 minus 1.0
.....\hbox(0.0+0.0)x2.0
.....\glue(\rightskip) -1.0
....\penalty 125
....\glue(\baselineskip) 20.0 plus 1.0
....\hbox(0.0+2.0)x13.0
.....\glue(\leftskip) 4.0
.....\hbox(0.0+0.0)x1.0, shifted 2.0
.....\glue 3.0
.....\hbox(0.0+0.0)x2.0
.....\glue 2.0 plus 6.0
.....\hbox(0.0+0.0)x2.0
.....\penalty 10000
.....\glue(\parfillskip) 0.0
.....\glue(\rightskip) -1.0
...\glue(\tabskip) 0.0 plus 40.0
..\glue 4.0 plus 2.0 minus 1.0
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\glue(\parskip) 0.0 plus 42.0 minus 8.0
.\glue(\baselineskip) 2.0 plus 41.0
.\hbox(8.0+2.0)x13.0
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x1.0
..\hbox(0.0+0.0)x0.0
..\hbox(0.0+0.0)x2.0, glue set -1.99255
...\glue 0.0 plus -1.00374
..\discretionary
..\rule(*+*)x-2.0
..\hbox(0.0+0.0)x2.0
..\rip A (ligature AAA)
..\kern2.0
..\rip B
..\glue(\rightskip) 0.0
.\penalty 162
.\glue(\baselineskip) 7.6 plus 41.0
.\hbox(0.4+0.0)x13.0
..\glue(\leftskip) 3.0
..\rule(*+*)x-2.0
..\hbox(0.0+0.0)x2.0
..\rip C (ligature B-)
..\vbox(0.4+0.0)x6.0
...\rule(0.4+0.0)x6.0
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0

{vertical mode: \looseness}
{\uchyph}
{\hsize}
{the letter A}
{horizontal mode: the letter A}
{blank space  }
{the character /}
{\vadjust}
{internal vertical mode: \uchyph}
{\ }
{horizontal mode: \ }
{the letter B}
{end-group character }}

Underfull \hbox (badness 10000) in paragraph at lines 200--200
 [] \rip BBBBBB

\hbox(7.0+1.0)x100.0, glue set 41.5
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{\vadjust}
{internal vertical mode: \ }
{horizontal mode: \ }
{\closeout}
{the letter B}
{end-group character }}

Underfull \hbox (badness 10000) in paragraph at lines 201--201
 [] []\rip BB-āB-āBBB

\hbox(7.0+1.0)x100.0, glue set 41.5
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{begin-group character {}
{\hyphenchar}
{end-group character }}
{\hyphenation}
{\vadjust}
{internal vertical mode: \ }
{horizontal mode: \ }
{the letter B}
{\kern}
{the letter B}
{end-group character }}

Underfull \hbox (badness 10000) in paragraph at lines 202--202
 [] \rip BBBCāBBBB

\hbox(8.0+2.0)x100.0, glue set 40.0
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{\hyphenchar}
{\vadjust}
{internal vertical mode: \def}
{\ }
{horizontal mode: \ }
{\pretolerance}
{the letter B}

\B ->B
{end-group character }}

Underfull \hbox (badness 10000) in paragraph at lines 203--203
 [] \rip BBBBBB

\hbox(7.0+1.0)x100.0, glue set 41.5
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{blank space  }
{\par}

Underfull \hbox (badness 10000) in paragraph at lines 195--204
 []\rip A /AA-āB-āBBB-āC-āACAC//

\hbox(8.0+2.0)x100.0, glue set 33.53377
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \hbox}
{restricted horizontal mode: \sfcode}
{the letter A}
{blank space  }
{the letter a}
{blank space  }
{end-group character }}
{vertical mode: \noindent}
{horizontal mode: \scriptscriptfont}
{math shift character $}
{display math mode: \eqno}
{math mode: superscript character ^}
{end-group character }}
{math shift character $}
! Math formula deleted: Insufficient extension fonts.
l.206 $$\eqno^{}$
                 \scriptfont3=\rip\fontdimen2\smalltrip=0pt
Sorry, but I can't typeset math unless \textfont 3
and \scriptfont 3 and \scriptscriptfont 3 have all
the \fontdimen values needed in math extension fonts.

! Display math should end with $$.
<to be read again> 
                   \scriptfont 
l.206 $$\eqno^{}$\scriptfont
                            3=\rip\fontdimen2\smalltrip=0pt
The `$' that I just saw supposedly matches a previous `$$'.
So I shall assume that you typed `$$' both times.

! Math formula deleted: Insufficient extension fonts.
<to be read again> 
                   \scriptfont 
l.206 $$\eqno^{}$\scriptfont
                            3=\rip\fontdimen2\smalltrip=0pt
Sorry, but I can't typeset math unless \textfont 3
and \scriptfont 3 and \scriptscriptfont 3 have all
the \fontdimen values needed in math extension fonts.

{horizontal mode: \scriptfont}
{\fontdimen}
{begin-group character {}
{\rightskip}
{\looseness}
{\spaceskip}
{the letter A}
{\spacefactor}
{\discretionary}
{restricted horizontal mode: end-group character }}
{\kern}
{the character -}
{end-group character }}
{the letter B}
{\kern}
{end-group character }}
{horizontal mode: blank space  }
{the letter C}
{math shift character $}
{math mode: blank space  }
{\scriptfont}
{\mathsurround}
{math shift character $}
! Math formula deleted: Insufficient symbol fonts.
<recently read> $
                 
l.210   \mathsurround143pt$
                            C $\mathsurround40pt$$\mathsurround60pt\hbox{$$}...
Sorry, but I can't typeset math unless \textfont 2
and \scriptfont 2 and \scriptscriptfont 2 have all
the \fontdimen values needed in math symbol fonts.

{horizontal mode: blank space  }
{the letter C}
{blank space  }
{math shift character $}
{math mode: \mathsurround}
{math shift character $}
{horizontal mode: math shift character $}
{math mode: \mathsurround}
{\hbox}
{restricted horizontal mode: math shift character $}
{math mode: math shift character $}
{restricted horizontal mode: end-group character }}
{math mode: math shift character $}
{horizontal mode: \par}
! Infinite glue shrinkage found in a paragraph.
l.210 ...ound40pt$$\mathsurround60pt\hbox{$$}$\par
                                                  }
The paragraph just ended includes some glue that has
infinite shrinkability, e.g., `\hskip 0pt minus 1fil'.
Such glue doesn't belong there---it allows a paragraph
of any length to fit on one line. But it's safe to proceed,
since the offensive shrinkability has been made finite.


Loose \hbox (badness 76) in paragraph at lines 206--210
 \rip A 

\hbox(7.0+1.0)x100.0, glue set 0.91347
.\glue(\leftskip) 3.0
.\rip A
.etc.


Loose \hbox (badness 91) in paragraph at lines 206--210
 \rip - 

\hbox(0.0+0.0)x100.0, glue set 0.97116
.\glue(\leftskip) 3.0
.\kern 2.0
.etc.


Tight \hbox (badness 12) in paragraph at lines 206--210
 \rip C$$ 

\hbox(0.0+0.0)x100.0, glue set - 0.5
.\glue(\leftskip) 3.0
.\rip C
.etc.


Loose \hbox (badness 71) in paragraph at lines 206--210
 \rip C 

\hbox(0.0+0.0)x100.0, glue set 0.89423
.\glue(\leftskip) 3.0
.\rip C
.etc.


Tight \hbox (badness 57) in paragraph at lines 206--210
 []$ 

\hbox(0.0+0.0)x100.0, glue set - 0.83
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x120.0 []
.etc.

{vertical mode: end-group character }}
{blank space  }
{\uccode}
{\font}
{\input}
! Font \mumble=mumble not loadable: Metric (TFM) file or installed font not fou
nd.
<to be read again> 
                   \relax 
...
l.211 \uccode`m=`A\font\mumble=mumble\input
                                            tripos % "AAAAAAAAAA"+errors
I wasn't able to read the size data for this font,
so I will ignore the font specification.
[Wizards can fix TFM files using TFtoPL/PLtoTF.]
You might try inserting a different font spec;
e.g., type `I\font<same font id>=<substitute font name>'.

{\relax}
{\input}
(tripos
{\par}
{\uppercase}
{the character 0}
{horizontal mode: the character 0}
Missing character: There is no 0 ("30) in font trip!
{begin-group character {}
{\outputpenalty}
! Missing number, treated as zero.
<to be read again> 
                   }
l.2 \uppercase {0{\outputpenalty }}
                                   
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

{end-group character }}
{blank space  }
{the character [}
Missing character: There is no [ ("5B) in font trip!
{\uppercase}
{the letter A}
Missing character: There is no [ ("5B) in font trip!
{blank space  }
)
{\par}

Underfull \hbox (badness 10000) in paragraph at lines 2--212
 [] \rip AAAAAAAAAA

\hbox(7.0+1.0)x100.0, glue set 45.5
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \penalty}
\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -33333.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.212 \par\penalty-33333 
                         % end hyphenation, math is next


Completed box being shipped out [-2.0.0.0.11]
\vbox(16383.99998+1.0)x100.0, glue set 16238.99998fil
.\glue(\topskip) 12.0 plus 1.0fil
.\hbox(8.0+2.0)x100.0, glue set 33.53377
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\rip A
..\glue 4.0 plus 1.99799 minus 1.00099
..\rip /
..\kern1.0
..\discretionary replacing 2
...\rip A (ligature AA)
...\kern3.0
...\rip -
..|\rip ā
..\rip A (ligature AA)
..\kern2.0
..\discretionary replacing 3
...\rip C (ligature B-)
..|\rip ā
..|\rip A (ligature BB)
..|\kern2.0
..|\rip B
..|\kern4.0
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\discretionary
...\rip -
..|\rip ā
..\discretionary replacing 1
...\rip C
...\rip -
..|\rip ā
..|\rip A
..\rip ^^82 (ligature CA)
..\rip ^^82 (ligature CA)
..\rip B (ligature C/)
..\rip /
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\hbox(7.0+1.0)x100.0, glue set 41.5
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\hbox(7.0+1.0)x100.0, glue set 41.5
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\closeout1
..\discretionary replacing 2
...\rip A (ligature BB)
...\kern3.0
...\rip -
..|\rip ā
..\rip A (ligature BB)
..\kern2.0
..\discretionary replacing 3
...\rip C (ligature B-)
..|\rip ā
..|\rip A (ligature BB)
..|\kern2.0
..|\rip B
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\hbox(8.0+2.0)x100.0, glue set 40.0
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\rip A (ligature BB)
..\kern2.0
..\discretionary replacing 3
...\rip B
...\kern4.0
...\rip C
..|\rip ā
..|\rip A (ligature BB)
..|\kern2.0
..|\rip B
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\kern 0.0
..\rip B
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\hbox(7.0+1.0)x100.0, glue set 41.5
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\kern2.0
..\rip A (ligature BB)
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\glue(\baselineskip) 0.0 plus 41.0
.\hbox(8.0+2.0)x20.0
..\rip A
..\kern2.0
..\rip B
..\glue 4.0 plus 2.0 minus 1.0
..\rip a
..\rip B
..\glue 4.0 plus 2.46799 minus 0.81036
.\glue(\parskip) 0.0 plus 42.0 minus 8.0
.\penalty 0
.\glue(\abovedisplayshortskip) 1.0 plus 45.0 minus 803.0
.\glue(\baselineskip) 8.0 plus 41.0
.\hbox(0.0+0.0)x0.0, shifted 50.0, display
.\penalty 10000
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x0.0, shifted 100.0, display
.\penalty 0
.\glue(\baselineskip) 3.0 plus 41.0
.\hbox(7.0+1.0)x100.0, glue set 0.91347
..\glue(\leftskip) 3.0
..\rip A
..\discretionary
..\glue(\rightskip) 0.0 plus 104.0 minus 100.0
.\penalty 37
.\glue(\baselineskip) 9.0 plus 41.0
.\hbox(0.0+0.0)x100.0, glue set 0.97116
..\glue(\leftskip) 3.0
..\kern 2.0
..\kern-1.00002
..\rip -
..\glue(\rightskip) 0.0 plus 104.0 minus 100.0
.\penalty -125
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x100.0, glue set - 0.5
..\glue(\leftskip) 3.0
..\rip C
..\mathon, surrounded 143.0
..\mathoff
..\glue(\rightskip) 0.0 plus 104.0 minus 100.0
.\penalty -125
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x100.0, glue set 0.89423
..\glue(\leftskip) 3.0
..\rip C
..\glue(\rightskip) 0.0 plus 104.0 minus 100.0
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x100.0, glue set - 0.83
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x120.0
...\mathon, surrounded 60.0
...\mathoff, surrounded 60.0
..\mathoff, surrounded 60.0
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0 plus 104.0 minus 100.0
.\glue(\parskip) 0.0 plus 42.0 minus 8.0
.\glue(\baselineskip) 3.0 plus 41.0
.\hbox(7.0+1.0)x100.0, glue set 45.5
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\glue 4.0 plus 2.0 minus 1.0
..\rip A (ligature AAAAAAAAAA)
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0

{vertical mode: begin-group character {}
{\catcode}
{\font}
! Improper `at' size (0.0pt), replaced by 10pt.
<to be read again> 
                   \font 
l.213 {\catcode`?=13 \font?xyzzy at0pt\font
                                            ? xyzzy scaled1?} % nonexistent
I can only handle fonts at positive sizes that are
less than 2048pt, so I've changed what you said to 10pt.

! Font ?=xyzzy at 10.0pt not loadable: Metric (TFM) file or installed font not 
found.
<to be read again> 
                   \font 
l.213 {\catcode`?=13 \font?xyzzy at0pt\font
                                            ? xyzzy scaled1?} % nonexistent
I wasn't able to read the size data for this font,
so I will ignore the font specification.
[Wizards can fix TFM files using TFtoPL/PLtoTF.]
You might try inserting a different font spec;
e.g., type `I\font<same font id>=<substitute font name>'.

{\font}
! Font ?=xyzzy scaled 1 not loadable: Metric (TFM) file or installed font not f
ound.
<to be read again> 
                   ?
l.213 ...3 \font?xyzzy at0pt\font ? xyzzy scaled1?
                                                  } % nonexistent
I wasn't able to read the size data for this font,
so I will ignore the font specification.
[Wizards can fix TFM files using TFtoPL/PLtoTF.]
You might try inserting a different font spec;
e.g., type `I\font<same font id>=<substitute font name>'.

{select font nullfont}
{end-group character }}
{blank space  }
{\font}
{\font}
! Improper `at' size (-10.0pt), replaced by 10pt.
l.215 \font\ip trip at -10pt 
                             % through the looking glass
I can only handle fonts at positive sizes that are
less than 2048pt, so I've changed what you said to 10pt.

{\showthe}
! You can't use `math shift character $' after \the.
l.216 \showthe$
               
I'm forgetting what you said and using zero instead.

> 0.
l.216 \showthe$
               

{blank space  }
{\showthe}
> \ip .
<recently read> \font 
                      
l.217 \showthe\font
                   

{\message}
{\fontname}
trip
{blank space  }
{select font trip}
{\textfont}
{\scriptfont}
{\scriptscriptfont}
{\def}
{blank space  }
{begin-group character {}
{\tracingmacros}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{\global}
{end-group character }}
{blank space  }
{\mathcode}
{\mathcode}
{\delcode}
{\catcode}
{\catcode}
{\mathcode}
{\mathcode}
{\def}
{begin-group character {}
{\catcode}
{\global}
{end-group character }}
{blank space  }
{\parshape}

\a ->1pt 11.0pt2pt 12.0pt3pt 13.0pt4pt 14.0pt5pt 15.0pt6pt 16.0pt7pt 17.0pt8pt 
18.0pt9pt 19.0pt10pt 20.0pt
{\chardef}
{\hangindent}
{\hangafter}
{\begingroup}
{\looseness}
{\rightskip}
{\-}
{horizontal mode: \-}
{the character -}
{\-}
{the character -}
{\-}
{blank space  }
{math shift character $}
{display math mode: \number}
{\the}
! Improper alphabetic constant.
<to be read again> 
                   \relax 
l.249 $$\number\the\delcode`\relax
                                  \over{{{}}}}\pagestretch=-1\pagetotal\show...
A one-character control sequence belongs after a ` mark.
So I'm essentially inserting \0 here.

{the character -}
{the character 1}
{\relax}
{\over}
{begin-group character {}
{math mode: begin-group character {}
{begin-group character {}
{end-group character }}
{end-group character }}
{end-group character }}
{display math mode: end-group character }}
! Extra }, or forgotten $.
l.249 $$\number\the\delcode`\relax\over{{{}}}}
                                              \pagestretch=-1\pagetotal\show...
I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

{\pagestretch}
{\showlists}

### display math mode entered at line 249
\mathord
.{}
this will begin denominator of:
\fraction, thickness = default
\\mathord []
\\mathord []
### vertical mode entered at line 0
### current page:
\glue(\topskip) 20.0 plus 1.0fil
\hbox(0.0+0.0)x11.0, glue set 1.3fil, shifted 1.0
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.
etc.
total height 40.0 plus -40.0 plus 1.0fil
 goal height 16383.99998
prevdepth 1.0, prevgraf 3 lines

! OK.
l.249 ...{{}}}}\pagestretch=-1\pagetotal\showlists
                                                  

{\begingroup}
{\halign}
! Missing \endgroup inserted.
<inserted text> 
                \endgroup 
...
l.250 \begingroup\halign
                         to\the\displaywidth{#&#\crcr\crcr\cr} % makes lines...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{\endgroup}
{\halign}
! Improper \halign inside $$'s.
<recently read> \halign 
                        
l.250 \begingroup\halign
                         to\the\displaywidth{#&#\crcr\crcr\cr} % makes lines...
Displays can use special alignments (like \eqalignno)
only if nothing but the alignment itself is between $$'s.
So I've deleted the formulas that preceded this alignment.

{internal vertical mode: \the}
{restricted horizontal mode: end of alignment template}

Loose \hbox (badness 1) in alignment at lines 250--250
 [] []

\hbox(0.0+0.0)x15.0, glue set 0.1875
.\glue(\tabskip) 0.0 plus 40.0
.\unsetbox(0.0+0.0)x0.0
.etc.

! Missing number, treated as zero.
<to be read again> 
                   =
l.253 ...ypenalty-\predisplaysize* \global\setbox=
                                                  
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Improper \setbox.
<recently read> =
                 
l.253 ...ypenalty-\predisplaysize* \global\setbox=
                                                  
Sorry, \setbox is not allowed after \halign in a display,
or between \accent and an accented character.

! Missing $$ inserted.
<to be read again> 
                   \eqno 
l.254 \eqno
            % another error (actually causes two error messages and inserts $$)
Displays can use special alignments (like \eqalignno)
only if nothing but the alignment itself is between $$'s.

\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -1179647.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
...
l.254 \eqno
            % another error (actually causes two error messages and inserts $$)



Completed box being shipped out [-2.0.0.0.11.0.327680]
\vbox(16383.99998+0.0)x20.0, glue set 16330.99998fil
.\glue(\topskip) 20.0 plus 1.0fil
.\hbox(0.0+0.0)x11.0, glue set 1.3fil, shifted 1.0
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\discretionary
..\ip -
..\glue(\rightskip) 0.0 plus 10.0fil minus 0.00002
.\penalty 37
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x12.0, glue set 2.0fil, shifted 2.0
..\glue(\leftskip) 3.0
..\kern-1.00002
..\ip -
..\discretionary
..\discretionary
..\ip -
..\glue(\rightskip) 0.0 plus 10.0fil minus 0.00002
.\penalty -213
.\glue(\baselineskip) 3.0 plus 41.0
.\hbox(7.0+1.0)x13.0, glue set 1.8fil, shifted 3.0
..\glue(\leftskip) 3.0
..\kern-1.00002
..\ip - (ligature -
)
..\ip -
..\discretionary
..\kern1.0
..\ip A
..\discretionary
...\ip -
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0 plus 10.0fil minus 0.00002
.\penalty 101
.\glue(\abovedisplayskip) 3.0
.\glue(\baselineskip) 9.0 plus 41.0
.\hbox(0.0+0.0)x15.0, glue set 0.1875, shifted 5.0, display
..\glue(\tabskip) 0.0 plus 40.0
..\hbox(0.0+0.0)x0.0
..\glue(\tabskip) 0.0 plus 40.0

{horizontal mode: \eqno}
! You can't use `\eqno' in horizontal mode.
<recently read> \eqno 
                      
l.254 \eqno
            % another error (actually causes two error messages and inserts $$)
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

{\looseness}
{math shift character $}
{math mode: \right}
! Missing delimiter (. inserted).
<to be read again> 
                   \mathchardef 
l.256 $\right\relax\mathchardef
                               \minus="322D % locally \minus is the same as =
I was expecting to see something like `(' or `\{' or
`\}' here. If you typed, e.g., `{' instead of `\{', you
should probably delete the `{' by typing `1' now, so that
braces don't get unbalanced. Otherwise just proceed.
Acceptable delimiters are characters whose \delcode is
nonnegative, or you can use `\delimiter <delimiter code>'.

! Extra \right.
<to be read again> 
                   \mathchardef 
l.256 $\right\relax\mathchardef
                               \minus="322D % locally \minus is the same as =
I'm ignoring a \right that had no matching \left.

{\mathchardef}
{\left}
{the letter A}
{\over}
{the letter A}
{\abovewithdelims}
! Missing delimiter (. inserted).
<to be read again> 
                   ?
l.257 \left.A\over A\abovewithdelims.?
                                      \right(+\mskip1A\minus=A+\penalty+1000A
I was expecting to see something like `(' or `\{' or
`\}' here. If you typed, e.g., `{' instead of `\{', you
should probably delete the `{' by typing `1' now, so that
braces don't get unbalanced. Otherwise just proceed.
Acceptable delimiters are characters whose \delcode is
nonnegative, or you can use `\delimiter <delimiter code>'.

! Missing number, treated as zero.
<to be read again> 
                   ?
l.257 \left.A\over A\abovewithdelims.?
                                      \right(+\mskip1A\minus=A+\penalty+1000A
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

! Illegal unit of measure (pt inserted).
<to be read again> 
                   ?
l.257 \left.A\over A\abovewithdelims.?
                                      \right(+\mskip1A\minus=A+\penalty+1000A
Dimensions can be in units of em, ex, in, pt, pc,
cm, mm, dd, cc, bp, or sp; but yours is a new one!
I'll assume that you meant to say pt, for printer's points.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

! Ambiguous; you need another { and }.
<to be read again> 
                   ?
l.257 \left.A\over A\abovewithdelims.?
                                      \right(+\mskip1A\minus=A+\penalty+1000A
I'm ignoring this fraction specification, since I don't
know whether a construction like `x \over y \over z'
means `{x \over y} \over z' or `x \over {y \over z}'.

{the character ?}
{\right}

(->\delimiter "4162362 
{the character +}
{\mskip}
! Illegal unit of measure (mu inserted).
<to be read again> 
                   A
l.257 ...\over A\abovewithdelims.?\right(+\mskip1A
                                                  \minus=A+\penalty+1000A
The unit of measurement in math glue must be mu.
To recover gracefully from this error, it's best to
delete the erroneous units; e.g., type `2' to delete
two letters. (See Chapter 27 of The TeXbook.)

{the letter A}
{\mathchar"322D}
{the character =}
{the letter A}
{the character +}
{\penalty}
{the letter A}
{blank space  }
{\relpenalty}
{\binoppenalty}
{\mathsurround}
{math shift character $}
! \scriptfont 0 is undefined (character ?).
<recently read> $
                 
l.260 \mathsurround.11em$
                         \x % this formula goes on line 7
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

{horizontal mode: \char"C8}
Missing character: There is no È ("C8) in font trip!
{math shift character $}
{display math mode: blank space  }
{\vadjust}
{internal vertical mode: \penalty}
{end-group character }}
{display math mode: \mkern}
{\the}
{the character 7}
{\prevgraf}
{\insert}
! You can't \insert255.
<to be read again> 
                   {
l.262 ...-9mu\the\prevgraf \prevgraf=8 \insert255{
                                                  \penalty999}
I'm changing to \insert0; box 255 is special.

{internal vertical mode: \penalty}
{end-group character }}
{display math mode: blank space  }
{\char"C8}
{\vcenter}
{internal vertical mode: end-group character }}
{display math mode: blank space  }
{begin-group character {}
{math mode: \mathaccent}
{the letter A}
{end-group character }}
{end-group character }}
{display math mode: subscript character |}
{blank space  }
{superscript character ^}
{math mode: \raise}
{restricted horizontal mode: the letter a}
{end-group character }}
{math mode: \displaystyle}
{\char}
{\textstyle}
{end-group character }}
{display math mode: blank space  }
{\overline}
{math mode: superscript character ^}
{blank space  }
{the letter A}
{subscript character |}
{\mathinner}
{end-group character }}
{superscript character ^}
{the letter A}
{blank space  }
{\mathchar}
{\char}
{subscript character ^^A}
{\mathaccent}
{\mathop}
{blank space  }
{\mathbin}
{blank space  }
{\mathopen}
{blank space  }
{\mathpunct}
{\mathclose}
{blank space  }
{\mathrel}
{blank space  }
{\global}
{\mathaccent}
{\fam}
{the letter A}
{the character 9}
{\the}
! Bad math family (-1).
<to be read again> 
                   }
l.269 ...ent"161 {\fam13A9\the\scriptscriptfont-1}
                                                  }}}}
Since I expected to read a number between 0 and 255,
I changed this one to zero.

{select font trip}
{end-group character }}
{end-group character }}
{end-group character }}
{end-group character }}
{end-group character }}
{display math mode: blank space  }
{\mathop}
{superscript character ^}
{\mathop}
{\nolimits}
{\limits}
{subscript character |}
{blank space  }
{\mathord}
! Missing { inserted.
<to be read again> 
                   \radical 
l.272 \mathord \radical
                       "161 % missing { will be inserted
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{math mode: \radical}
{\textstyle}
{\radical}
{\left}

(->\delimiter "4162362 
{\scriptscriptstyle}
{\mathop}
{\underline}
{blank space  }
{the letter A}
{\atop}
{\displaystyle}
{the letter A}
{subscript character |}
{the letter A}
{\hfil}
{\over}
{the letter B}
{\nonscript}
{\kern}
{end-group character }}
{superscript character ^}
{end-group character }}
{end-group character }}
{blank space  }
{\nolimits}
{subscript character |}
{\mathop}
{\nonscript}
{\textstyle}
{\nonscript}
{\mskip}
{\showthe}
> 9.0mu minus 1.0fil.
l.276         \showthe\lastskip
                                B\abovewithdelims(.2pt\displaylimits}^z

{the letter B}
{\abovewithdelims}

(->\delimiter "4162362 
{\displaylimits}
! Limit controls must follow a math operator.
<recently read> \displaylimits 
                               
l.276 ...skip B\abovewithdelims(.2pt\displaylimits
                                                  }^z
I'm ignoring this misplaced \limits or \nolimits command.

{end-group character }}
{superscript character ^}

z->\delimiter "4162362 
{blank space  }
{\discretionary}
{restricted horizontal mode: \showthe}
> 1000.
l.277       \discretionary{\showthe\spacefactor
                                               -}{\smalltrip A\hss}{\smalltr...


{the character -}
{end-group character }}
{select font trip at 5.0pt}
{the letter A}
{\hss}
{end-group character }}
! Improper discretionary list.
l.277 ...{\showthe\spacefactor-}{\smalltrip A\hss}
                                                  {\smalltrip A}
Discretionary lists must contain only boxes and kerns.

The following discretionary sublist has been deleted:
\glue 0.0 plus 1.0fil minus 1.0fil

{select font trip at 5.0pt}
{the letter A}
{end-group character }}
! Illegal math \discretionary.
l.277 ...efactor-}{\smalltrip A\hss}{\smalltrip A}
                                                  
Sorry: The third part of a discretionary break must be
empty, in math formulas. I had to delete your third part.

{math mode: blank space  }
{\right}
{the letter A}
{end-group character }}
{end-group character }}
{end-group character }}
{display math mode: blank space  }
{\let}
{\aftergroup}
{\eqno}
{math mode: \aftergroup}
{\scriptstyle}
{\mathchar"232D}

(->\delimiter "4162362 
{\delimiter}
{\mathpunct}
{the letter A}
{the letter A}
{end-group character }}
{blank space  }
{subscript character |}
{the letter B}
{\fam}
{the character -}
{end-group character }}
{superscript character ^}
{\hbox}
{restricted horizontal mode: the letter A}
{end-group character }}
{math mode: end-group character }}
{begin-group character {}
{\above}
{begin-group character {}
{the letter v}
{\overwithdelims}
{blank space  }
{\displaystyle}
{begin-group character {}
{the letter p}
{the letter q}
{\atopwithdelims}

(->\delimiter "4162362 

(->\delimiter "4162362 
{\vrule}
{end-group character }}
{end-group character }}
{blank space  }
{\show}
> \penalty=\mathchar"232D.
l.284   \show\penalty
                      \showlonglists


\showlonglists ->{\tracingcommands 0\pagefillstretch -1\dimen 100 \showboxbread
th 9999 \showboxdepth 9999 \showlists \pagegoal =10000pt}
{begin-group character {}
{\tracingcommands}

### math mode entered at line 284
### math mode entered at line 282
\mathord
.\fraction, thickness = default
.\\mathord
.\.\fam1 v
./\displaystyle
./\mathord
./.\fraction, thickness 0.0, left-delimiter "162362, right-delimiter "162362
./.\\mathord
./.\.\fam1 p
./.\\mathrel
./.\.\fam1 q
././\rule(9.0+*)x0.4
\mathord
this will begin denominator of:
\fraction, thickness 9.0
\{}
### math mode entered at line 280
\scriptstyle
\mathbin
.\fam3 -
\mathopen
.\fam1 b
\mathpunct
.\mathord
..\fam1 A
.\mathord
..\fam1 A
^\hbox(7.0+1.0)x2.0
^.\ip A
_\mathord
_.\fam1 B
_\mathord
_.\fam0 -
\mathord
### display math mode entered at line 261
\vadjust
.\penalty 7
\mkern-9.0mu
\mathord
.\fam0 7
\insert0, natural size 0.0; split(1.0 plus 43.0,-2.0); float cost 100
.\penalty 999
\mathord
.\fam0 È
\vcenter
.\vbox(-2.0+0.0)x0.0
\accent\fam3 -
.\fam1 A
^\mathord
^.\hbox(7.0+1.0)x2.0, shifted -2.0
^..\ip a
^\displaystyle
^\mathbin
^.\fam1 /
^\textstyle
_\fam0 -
\overline
.\mathord
.^\fam1 A
.\mathord
..\fam1 A
._\fam3 -
.\mathinner
..{}
.^\mathord
.^.\fam1 A
.^\mathord
.^.\fam1 A
.^\mathord
.^.\fam1 B
.^_\accent\fam1 a
.^_.\mathop
.^_..\fam1 A
.^_.\mathbin
.^_..\fam1 A
.^_.\mathopen
.^_..\fam1 A
.^_.\mathpunct
.^_..\fam1 A
.^_.\mathclose
.^_..\fam1 A
.^_.\mathrel
.^_..\fam1 A
.^_.\accent\fam1 a
.^_..\mathord
.^_...\fam13 A
.^_..\mathord
.^_...\fam13 9
\mathop
.\fam1 B
^\fam1 C
\mathop\limits
.\fam1 b
_\fam1 C
\mathord
.\radical"161
..\textstyle
..\radical"282382
...\mathinner
....\left"162362
....\scriptscriptstyle
....\mathop\nolimits
.....\underline
......\fraction, thickness 0.0
......\\mathord
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! OK.
\showlonglists ...9 \showboxdepth 9999 \showlists 
                                                  \pagegoal =10000pt}
l.284   \show\penalty \showlonglists
                                    

{math shift character $}
! Missing } inserted.
<inserted text> 
                }
...
l.285   $
         \expandafter$\csname!\endcsname % end of hairy display, missing } i...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{math shift character $}
{display math mode: \expandafter}
{\csname}
Missing character: There is no v ("76) in font trip!
! \textfont 0 is undefined (character 7).
<to be read again> 
                   \relax 
...
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

! \textfont 0 is undefined (character È).
<to be read again> 
                   \relax 
...
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

! \scriptfont 0 is undefined (character -).
<to be read again> 
                   \relax 
...
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

! \scriptscriptfont 13 is undefined (character A).
<to be read again> 
                   \relax 
...
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

! \scriptscriptfont 13 is undefined (character 9).
<to be read again> 
                   \relax 
...
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

Missing character: There is no   ("20) in font trip!

Overfull \hbox (48.4746pt too wide) detected at line 285
[][][] [] [] []|

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{horizontal mode: \expandafter}
{undefined}
! Undefined control sequence.
<recently read> \!
                  
l.285   $\expandafter$\csname!\endcsname
                                         % end of hairy display, missing } i...
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

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{horizontal mode: \relax}
{\parshape}
{\leftskip}
{\spacefactor}
{\raise}
{restricted horizontal mode: \special}
{blank space  }
{end-group character }}
{horizontal mode: blank space  }
{\penalty}
{\showbox}
> \box0=
\vbox(0.0+0.0)x0.0
.\penalty 999

! OK.
<to be read again> 
                   \spacefactor 
l.289 \showbox0\spacefactor
                           =0

{\spacefactor}
! Bad space factor (0).
l.289 \showbox0\spacefactor=0
                             
I allow only values in the range 1..32767 here.

{\write}
{\par}

Underfull \hbox (badness 10000) in paragraph at lines 285--290
 []  

\hbox(1.0+0.0)x90.0, glue set 41.0
.\glue(\leftskip) 0.0 plus -10.0fil
.\hbox(0.0+0.0)x4.0, shifted -1.0 []
.etc.


Underfull \hbox (badness 10000) in paragraph at lines 285--290
 [] 

\hbox(0.0+0.0)x100.0
.\glue(\leftskip) 0.0 plus -10.0fil
.\write10{\the \spacefactor }
.etc.

{vertical mode: end-group character }}
! Extra }, or forgotten \endgroup.
l.291 }
        % this fails to match \begingroup
I've deleted a group-closing symbol because it seems to be
spurious, as in `$x}$'. But perhaps the } is legitimate and
you forgot something else, as in `\hbox{$x}'. In such cases
the way to recover is to insert both the forgotten and the
deleted material, e.g., by typing `I$}'.

{blank space  }
{\aftergroup}
{\aftergroup}
{\endgroup}
{\lccode}
{\mark}
! Improper \spacefactor.
l.293 \mark{\the\spacefactor
                            } % \spacefactor: not in vertical mode
You can refer to \spacefactor only in horizontal mode;
you can refer to \prevdepth only in vertical mode; and
neither of these is meaningful inside \write. So
I'm forgetting what you said and using zero instead.

{blank space  }
{math shift character $}
{horizontal mode: math shift character $}

Underfull \hbox (badness 10000) in paragraph at lines 294--294
 []

\hbox(0.0+0.0)x11.0
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{display math mode: \global}
{\mskip}
{\catcode}
{\catcode}
{\the}
{\def}
{blank space  }
{\vtop}
{internal vertical mode: \everydisplay}
{\vbox}
{end-group character }}
{\noindent}
{horizontal mode: math shift character $}
\everydisplay->\global 
{display math mode: \global}
{\lowercase}
{the letter a}
{the letter a}

j->\relax 
{\relax}
{math shift character $}
{internal vertical mode: \ifvmode}
{true}
{horizontal mode: \fi}
{end-group character }}
{display math mode: \hss}
{\leqno}
{math mode: \mathchardef}
! Missing control sequence inserted.
<inserted text> 
                \inaccessible 
...
l.298 \leqno\mathchardef A
                          \/\left(\over\left(\global\errorcontextlines5$$
Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.

! Missing number, treated as zero.
<to be read again> 
                   A
l.298 \leqno\mathchardef A
                          \/\left(\over\left(\global\errorcontextlines5$$
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

{the letter A}
{\/}
{\left}

(->\delimiter "4162362 
{\over}
{\left}

(->\delimiter "4162362 
{\global}
{math shift character $}
! Missing \right. inserted.
<inserted text> 
                \right .
<to be read again> 
                   $
l.298 ...ft(\over\left(\global\errorcontextlines5$
                                                  $
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{\right}
{math shift character $}
! Missing \right. inserted.
<inserted text> 
                \right .
<to be read again> 
                   $
l.298 ...ft(\over\left(\global\errorcontextlines5$
                                                  $
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{\right}
{math shift character $}
\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
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{internal vertical mode: \tracingcommands}
> -1179647.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.298 ...t(\over\left(\global\errorcontextlines5$$
                                                  


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..\glue 4.0 plus 2.0 minus 1.0
..\penalty -10000
..\glue(\rightskip) 0.0 plus 10.0fil minus 0.00002
.\penalty 125
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x100.0
..\glue(\leftskip) 0.0 plus -10.0fil
..\write10{\the \spacefactor }
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0 plus 10.0fil minus 0.00002
.\mark{0}
.\glue(\parskip) 0.0 plus 42.0 minus 8.0
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x11.0, shifted 1.0
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\penalty 10000
..\glue(\parfillskip) 0.0
..\glue(\rightskip) 0.0
.\penalty 0
.\glue(\abovedisplayskip) 3.0
.\glue(\lineskip) 0.0 plus 40.0
.\hbox(12.0+13.00002)x13.0, shifted 3.0
..\hbox(12.0+4.0)x8.1778, display
...\ip A
...\kern1.0
...\kern0.0
...\glue(\thinmuskip) 0.27777 plus 2.0fill minus 0.83331
...\hbox(12.0+4.0)x4.90002
....\hbox(8.0+2.0)x3.0, shifted -4.0
.....\ip b
....\hbox(9.2+4.0)x1.80002
.....\hbox(0.0+0.0)x0.1, shifted -7.0
.....\vbox(9.2+4.0)x1.6
......\hbox(0.0+0.0)x1.6
......\kern1.7
......\rule(1.0+0.0)x*
......\kern1.0
......\hbox(9.5+0.0)x1.6
.......\hbox(4.0+1.0)x1.5, shifted -5.5
........\smalltrip b
.......\hbox(0.0+0.0)x0.1, shifted -7.0
.....\hbox(0.0+0.0)x0.1, shifted -7.0
....\hbox(0.0+0.0)x0.1, shifted -7.0
..\kern5.0
..\hbox(0.0+13.00002)x-0.1778, glue set - 57.67767fil, display
...\glue 4.99988 minus 4.99988
...\vbox(-0.00002+13.00002)x52.5, glue set - 0.00247
....\vbox(-0.00002+0.0)x0.0
....\glue(\parskip) 0.0 plus 42.0 minus 8.0
....\penalty 0
....\glue(\abovedisplayshortskip) 1.0 plus 45.0 minus 803.0
....\glue(\baselineskip) 3.0 plus 41.0
....\hbox(7.0+1.0)x5.0, shifted 47.5, display
.....\ip a
.....\ip a
.....\kern1.0
....\penalty -1179647
....\glue(\belowdisplayshortskip) 3.0 plus 46.0
...\glue 0.0 plus 1.0fil minus 1.0fil

\write->\the \spacefactor 
! Improper \spacefactor.
<write> \the \spacefactor 
                          
<inserted text> 
                }\endwrite 
<to be read again> 
                   }
<output> ...ifhbox 254 \error \fi 54\copy 25\fi 4}
                                                   \ifvoid 254\relax \else \...
l.298 ...t(\over\left(\global\errorcontextlines5$$
                                                  
You can refer to \spacefactor only in horizontal mode;
you can refer to \prevdepth only in vertical mode; and
neither of these is meaningful inside \write. So
I'm forgetting what you said and using zero instead.

0
{horizontal mode: \par}
{vertical mode: \hangindent}
{\par}
{\showthe}
> 0.0pt.
l.300 \hangindent1pt\par\showthe\hangindent
                                           \hangindent 254cm

{\hangindent}
{\parfillskip}
{\fontdimen}
{\the}
{\the}
{the character 0}
{horizontal mode: the character 0}
Missing character: There is no 0 ("30) in font trip!
{the letter A}
{blank space  }
{\char}
{math shift character $}

Loose \hbox (badness 62) in paragraph at lines 302--303
 []\ip A ^^82 

\hbox(7.0+1.0)x100.0, glue set 0.85295
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{display math mode: \global}
{\leqno}
{math mode: \kern}
{math shift character $}
! Display math should end with $$.
<to be read again> 
                   \par 
l.303 ...nt8=\predisplaysize\leqno\kern1009pt$\par
                                                  
The `$' that I just saw supposedly matches a previous `$$'.
So I shall assume that you typed `$$' both times.

\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -1179647.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
<to be read again> 
                   \par 
l.303 ...nt8=\predisplaysize\leqno\kern1009pt$\par
                                                  


Completed box being shipped out [-2.0.0.0.11.0.327680.1572864.1073741823.-10737
41823]
\vbox(16383.99998+0.0)x8236.0, glue set 16343.99998fil
.\glue(\topskip) 13.0 plus 1.0fil
.\hbox(7.0+1.0)x100.0, glue set 0.85295
..\glue(\leftskip) 3.0
..\hbox(0.0+0.0)x0.0
..\ip A
..\glue 4.0 plus 1.99799 minus 1.00099
..\ip ^^82
..\penalty 10000
..\glue(\parfillskip) 0.0 plus 100.0
..\glue(\rightskip) 0.0
.\penalty 0
.\glue(\baselineskip) 9.0 plus 41.0
.\hbox(0.0+0.0)x1009.0, shifted 7227.0, display
..\kern 1009.0
.\penalty 10000
.\glue(\baselineskip) 10.0 plus 41.0
.\hbox(0.0+0.0)x-7127.0, shifted 7227.0, display

{horizontal mode: \par}
{vertical mode: \showlists}

### vertical mode entered at line 0
prevdepth 0.0, prevgraf 4 lines

! OK.
l.304 \showlists
                 {\catcode`!13\global\everyhbox{\def!{}}}

{begin-group character {}
{\catcode}
{\global}
{end-group character }}
{blank space  }
{\count}
{\baselineskip}
{begin-group character {}
{\sfcode}
{\vfuzz}
{\everyvbox}
{\vbox}
\everyvbox-> 
{internal vertical mode: blank space  }
{\hsize}
{\tolerance}
{the letter A}
{horizontal mode: the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{\clubpenalty}
{\par}

Overfull \hbox (3.0pt too wide) in paragraph at lines 308--308
 []\ip A A A|

\hbox(7.0+1.0)x10.0, glue set - 1.0
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.


Tight \hbox (badness 12) in paragraph at lines 308--308
 \ip A A 

\hbox(7.0+1.0)x10.0, glue set - 0.5
.\glue(\leftskip) 3.0
.\ip A
.etc.

{internal vertical mode: \hbadness}
{\hfuzz}
{the letter A}
{horizontal mode: the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{blank space  }
{the letter A}
{\leaders}
{\par}
{internal vertical mode: end-group character }}

Overfull \vbox (18.0pt too high) detected at line 309

\vbox(11.0+1.0)x10.0, glue set - 1.0
.\hbox(7.0+1.0)x10.0, glue set - 1.0 []
.\penalty 10000
.etc.

{vertical mode: blank space  }
{\message}
1000000
{end-group character }}
{blank space  }
{\vbox}
{internal vertical mode: \hbadness}
{\hfuzz}
{\hbox}
\everyhbox->\def !{}
{restricted horizontal mode: \def}
{\hskip}
{end-group character }}

Overfull \hbox (1.0pt too wide) detected at line 311
 

\hbox(0.0+0.0)x0.0, glue set - 1.0
.\glue 10.0 minus 9.0

{internal vertical mode: blank space  }
{\hbadness}
{\hbox}
\everyhbox->\def !{}
{restricted horizontal mode: \def}
{\hskip}
{end-group character }}

Underfull \hbox (badness 101) detected at line 312
 

\hbox(0.0+0.0)x10.03749, glue set 1.00375
.\glue 0.0 plus 10.0

{internal vertical mode: \tracingcommands}
{\message}
101
{end-group character }}
{vertical mode: \lineskiplimit}
{\everyhbox}
{blank space  }
{\def}
{blank space  }
{\dimendef}
{\dimen}
{\vbox}
{internal vertical mode: \tracinglostchars}
{the letter A}
{horizontal mode: the letter A}
{\/}

\space -> 
{blank space  }

\space -> 
{blank space  }
{\ignorespaces}

\space -> 

\space -> 
{the letter J}
{blank space  }
{\vskip}
{\par}

Loose \hbox (badness 56) in paragraph at lines 315--316
 []\ip A   

\hbox(7.0+1.0)x100.0, glue set 0.82695
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{internal vertical mode: \vskip}
{\moveleft}
{\boxmaxdepth}
{\mark}
{end-group character }}

Underfull \vbox (badness 10000) detected at line 316

\vbox(10.0+-1.0)x0.0
.\mark{vii}

{\vskip}
{\unskip}
{\setbox}
{\showthe}
> -1.0pt.
l.317   \unskip\setbox22=\lastbox\showthe\lastskip
                                                   % \lastskip=-1pt (\baseli...


{\unskip}
{\vskip}
{\kern}
{\penalty}
{\showbox}
> \box22=
\vbox(10.0+-1.0)x0.0
.\mark{vii}

! OK.
<to be read again> 
                   }
l.318 ...kern\lastkern\penalty\lastkern\showbox22}
                                                  

{end-group character }}

Underfull \vbox (badness 10000) detected at line 318

\vbox(11.0+0.0)x100.0
.\hbox(7.0+1.0)x100.0, glue set 0.82695 []
.\glue 2.0
.etc.

{vertical mode: blank space  }
{\showbox}
> \box22=void

! OK.
<to be read again> 
                   \kern 
l.319 \showbox22\kern
                     3pt\message{\the\lastkern}\unkern

{\kern}
{\message}
3.0pt
{\unkern}
{\show}
> \botmark=\botmark:
0.
l.320 \show\botmark
                    \catcode`;13\def;{\setbox`; }

{\catcode}
{\def}
{blank space  }
{\lineskiplimit}

\space -> 

\space -> 
{blank space  }
{\count}
{\vbox}

\space -> 
{internal vertical mode: \accent}
{horizontal mode: \accent}
Missing character: There is no È ("C8) in font trip!

\space -> 
{blank space  }
{\accent}

\space -> 

;->\setbox `; 
! Improper \setbox.
<to be read again> 
                   \char 
l.322 ...ace\accent\space"42 \def\^^M{\  } ; \char
                                                  '101
Sorry, \setbox is not allowed after \halign in a display,
or between \accent and an accented character.

{the letter A}
{\ }
{\fontdimen}
{\ }
{\spaceskip}

\^^M->\ 
{\ }
{\vskip}
{\par}

Loose \hbox (badness 44) in paragraph at lines 322--324
 [] []\ip AA   

\hbox(10.50002+1.0)x100.0, glue set 0.76414
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{internal vertical mode: \vskip}
{end-group character }}

Overfull \vbox (0.50002pt too high) detected at line 324

\vbox(11.0+0.0)x100.0, glue set - 1.0
.\hbox(10.50002+1.0)x100.0, glue set 0.76414 []
.\glue 10.0 minus 10.0

{vertical mode: blank space  }
{\penalty}
\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -2147483647.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.325 \penalty-2147483647 
                          % that's the largest value TeX will scan


Completed box being shipped out [-2.0.0.0.11.196608.327680.1572864.1073741823]
\vbox(16383.99998+0.0)x100.0, glue set 16331.99998fil
.\glue(\topskip) 9.0 plus 1.0fil
.\vbox(11.0+1.0)x10.0, glue set - 1.0
..\hbox(7.0+1.0)x10.0, glue set - 1.0
...\glue(\leftskip) 3.0
...\hbox(0.0+0.0)x0.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\glue(\rightskip) 0.0
...\rule(*+*)x5.0
..\penalty 10000
..\glue(\baselineskip) 2.0
..\hbox(7.0+1.0)x10.0, glue set - 0.5
...\glue(\leftskip) 3.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\penalty 10000
...\glue(\parfillskip) 0.0 plus 100.0
...\glue(\rightskip) 0.0
..\glue(\parskip) 0.0 plus 42.0 minus 8.0
..\glue(\baselineskip) 2.0
..\hbox(7.0+1.0)x10.0, glue set - 1.0
...\glue(\leftskip) 3.0
...\hbox(0.0+0.0)x0.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\glue(\rightskip) 0.0
..\penalty 10000
..\glue(\baselineskip) 2.0
..\hbox(7.0+1.0)x10.0, glue set - 0.5
...\glue(\leftskip) 3.0
...\ip A
...\glue 4.0 plus 1.0 minus 2.0
...\ip A
...\penalty 10000
...\glue(\parfillskip) 0.0 plus 100.0
...\glue(\rightskip) 0.0
.\glue(\lineskip) 0.0 plus 40.0
.\vbox(10.0+0.0)x10.03749
..\hbox(0.0+0.0)x0.0, glue set - 1.0
...\glue 10.0 minus 9.0
..\glue(\baselineskip) 10.0
..\hbox(0.0+0.0)x10.03749, glue set 1.00375
...\glue 0.0 plus 10.0
.\glue(\baselineskip) -1.0
.\vbox(11.0+0.0)x100.0
..\hbox(7.0+1.0)x100.0, glue set 0.82695
...\glue(\leftskip) 3.0
...\hbox(0.0+0.0)x0.0
...\ip A
...\kern 1.0
...\glue 4.0 plus 1.99799 minus 1.00099
...\glue 4.0 plus 1.99799 minus 1.00099
...\penalty 10000
...\glue(\parfillskip) 0.0 plus 100.0
...\glue(\rightskip) 0.0
..\glue 2.0
..\glue -2.0
..\kern 0.0
..\penalty 0
.\glue(\lineskip) 0.0 plus 40.0
.\vbox(11.0+0.0)x100.0, glue set - 1.0
..\hbox(10.50002+1.0)x100.0, glue set 0.76414
...\glue(\leftskip) 3.0
...\hbox(0.0+0.0)x0.0
...\glue 4.0 plus 2.0 minus 1.0
...\kern -5.50003 (for accent)
...\hbox(8.0+2.0)x3.0, shifted -2.50002
....\ip B
...\kern 2.50003 (for accent)
...\ip A
...\ip A
...\glue 4.0 plus 2.0 minus 1.0
...\glue 4.0 plus 2.0 minus 88.0
...\penalty 10000
...\glue(\parfillskip) 0.0 plus 100.0
...\glue(\rightskip) 0.0
..\glue 10.0 minus 10.0

{vertical mode: \penalty}
! Number too big.
l.326 \penalty-2147483648
                          % see?
I can only go up to 2147483647='17777777777="7FFFFFFF,
so I'm using that number instead of yours.

{\tabskip}
{\let}
{\count}
{begin-group character {}
{\errhelp}
{\errmessage}
! .
l.328 ...unt1=2{\errhelp{all is lost}\errmessage{}
                                                  }
all is lost

{end-group character }}
{blank space  }
{\def}
{blank space  }
{\looseness}
{\setbox}
{internal vertical mode: \vskip}
{end-group character }}
{vertical mode: blank space  }
{\halign}
{internal vertical mode: \iftrue}
{true}
{\else}

\d #1\d ->#1#1
#1<-##
! Only one # is allowed per tab.
<argument> ##
             
\d #1\d ->#1#1
              
l.333 ...ss\tabskip1ex plus7200bp minus 4\wd4\d#\d
                                                  \cr % \d#\d becomes (erron...
There should be exactly one # between &'s, when an
\halign or \valign is being set up. In this case you had
more than one, so I'm ignoring all but the first.

{restricted horizontal mode: \global}
{\spaceskip}
{\def}
{\def}
{\expandafter}

\A ->B

\xx ->\global \gdef \A {\global \count \count 1=####\cr \omit \cr \tabskip }
{\global}
{the letter B}
{end of alignment template}
{\vbox}
{internal vertical mode: \halign}

\A ->\global \count \count 1=##\cr \omit \cr \tabskip 
{restricted horizontal mode: end of alignment template}
{\global}
{end of alignment template}
{internal vertical mode: the letter A}
{horizontal mode: the letter A}
{end-group character }}

Loose \hbox (badness 86) in paragraph at lines 337--337
 []\ip AA 

\hbox(7.0+1.0)x100.0, glue set 0.95
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{restricted horizontal mode: blank space  }
{end of alignment template}
{\valign}
{internal vertical mode: the letter A}
{horizontal mode: the letter A}
Missing character: There is no } ("7D) in font trip!
{end of alignment template}

Loose \hbox (badness 86) in paragraph at lines 337--337
 []\ip A 

\hbox(7.0+1.0)x100.0, glue set 0.95
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{internal vertical mode: end of alignment template}
{begin-group character {}
{blank space  }
{end-group character }}
{end of alignment template}
{end of alignment template}

Overfull \vbox (21.99997pt too high) in alignment at lines 337--337

\vbox(-5.0+0.0)x0.0
.\glue(\tabskip) 4.49998 plus 7227.0
.\unsetbox(0.0+0.0)x0.0
.etc.

{restricted horizontal mode: end of alignment template}
{\global}
{\fontname}
{\romannumeral}
{blank space  }
{\lccode}

\A ->\uppercase { \message {trip at 5.0pt\ip mix}\lowercase {vq}} 
{\uppercase}
{blank space  }
{\message}
TRIP AT 5.0PT\ip AIX
{\lowercase}
{the letter v}
Missing character: There is no v ("76) in font trip!
{the letter b}
{blank space  }
{end of alignment template}
{math shift character $}
{math mode: math shift character $}
{restricted horizontal mode: end of alignment template}

\A ->\uppercase { \message {trip at 5.0pt\ip mix}\lowercase {vq}} 
{\hss}
{\uppercase}
{blank space  }
{\message}
TRIP AT 5.0PT\ip AIX
{\lowercase}
{the letter v}
Missing character: There is no v ("76) in font trip!
{the letter b}
{blank space  }
{end of alignment template}
{\show}
> \A=macro:
->\uppercase { \message {trip at 5.0pt\ip mix}\lowercase {vq}} .
<template> \A 
              \endtemplate 
l.340   \lccode`Q=`b \span\omit$$\span\A&\show\cr
                                                 \omit\cr

{end of alignment template}
{end of alignment template}
{internal vertical mode: \global}
{\errmessage}
! \count 2=-1118806.
<recently read> }
                 
l.341 ...depth20pt\errmessage{\count2=\the\count2}
                                                  }
This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.

{end-group character }}
{restricted horizontal mode: \mark}
{end of alignment template}
{\mark}
{end of alignment template}

Tight \hbox (badness 12) in alignment at lines 331--342
 [] [] [] [] 

\hbox(0.0+0.0)x205.12613, glue set - 0.5
.\glue(\tabskip) 0.0154 minus 3.21002
.\unsetbox(0.0+0.0)x0.0
.etc.

{vertical mode: blank space  }
{\errmessage}
! \prevdepth =0.0pt.
l.343 \errmessage{\prevdepth=\the\prevdepth}
                                            
(That was another \errmessage.)

{blank space  }
{\penalty}
\output->{\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showb
oxdepth 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \e
rror \fi 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }
{internal vertical mode: \tracingcommands}
> -88888.
<output> ...cingcommands 0\showthe \outputpenalty 
                                                  \showboxbreadth 9999 \show...
l.344 \penalty-88888 
                     % end alignment test, now miscellaneous error messages


Completed box being shipped out [-2.2.-1118806.0.11.196608.327680.1572864.10737
41823]
\vbox(16383.99998+0.0)x205.12613, glue set 16343.99998fil
.\glue(\topskip) 0.0 plus 1.0fil
.\hbox(20.0+2.0)x205.12613, glue set - 0.5
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(20.0+2.0)x0.0, glue set - 1.0
...\ip B
...\vbox(20.0+1.0)x100.0
....\hbox(0.0+0.0)x0.0, glue set 0.00174
.....\glue(\tabskip) 4.49998 plus 7227.0
.....\hbox(0.0+0.0)x0.0
.....\glue(\tabskip) -17.07162
....\glue(\baselineskip) 10.0
....\hbox(0.0+0.0)x0.0, glue set 0.00174
.....\glue(\tabskip) 4.49998 plus 7227.0
.....\hbox(0.0+0.0)x0.0
.....\glue(\tabskip) -17.07162
....\glue(\parskip) 0.0 plus 42.0 minus 8.0
....\glue(\baselineskip) 3.0
....\hbox(7.0+1.0)x100.0, glue set 0.95
.....\glue(\leftskip) 3.0
.....\hbox(0.0+0.0)x0.0
.....\ip A (ligature AA)
.....\penalty 10000
.....\glue(\parfillskip) 0.0 plus 100.0
.....\glue(\rightskip) 0.0
...\glue(\spaceskip) 4.0 minus 0.00002
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x106.9846
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(20.0+2.0)x100.0
...\vbox(-5.0+0.0)x100.0
....\glue(\tabskip) 4.49998 plus 7227.0
....\vbox(0.0+0.0)x100.0
.....\hbox(7.0+1.0)x100.0, glue set 0.95
......\glue(\leftskip) 3.0
......\hbox(0.0+0.0)x0.0
......\ip A
......\penalty 10000
......\glue(\parfillskip) 0.0 plus 100.0
......\glue(\rightskip) 0.0
....\glue(\tabskip) 0.0
....\vbox(8.0+0.0)x0.0
....\glue(\tabskip) 4.49998 plus 7227.0
...\vbox(-5.0+0.0)x0.0
....\glue(\tabskip) 4.49998 plus 7227.0
....\vbox(0.0+0.0)x0.0
....\glue(\tabskip) 0.0
....\vbox(8.0+0.0)x0.0
....\glue(\tabskip) 4.49998 plus 7227.0
..\glue(\tabskip) 4.49998 plus 7227.0
.\glue(\baselineskip) 0.0
.\hbox(8.0+2.0)x205.12613, glue set - 0.5
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(8.0+2.0)x0.0, glue set 177.80537fil
...\glue 4.0 plus 2.0 minus 88.0
...\glue 4.0 plus 2.0 minus 88.0
...\ip b
...\glue 4.0 plus 2.0 minus 88.0
...\mathon
...\mathoff
...\glue 0.0 plus 1.0fil minus 1.0fil
...\glue 4.0 plus 2.0 minus 88.0
...\ip b
...\glue 4.0 plus 2.0 minus 88.0
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x106.9846
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x100.0
..\glue(\tabskip) 4.49998 plus 7227.0
..\hbox(8.0+2.0)x0.0
..\glue(\tabskip) 0.0154 minus 3.21002
.\glue(\baselineskip) 8.0
.\hbox(0.0+0.0)x205.12613, glue set - 0.5
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x0.0
..\glue(\tabskip) 0.0154 minus 3.21002
.\glue(\lineskip) 0.0 plus 40.0
.\hbox(0.0+0.0)x205.12613, glue set - 0.5
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x0.0
..\glue(\tabskip) 0.0154 minus 3.21002
..\hbox(0.0+0.0)x106.9846
..\glue(\tabskip) 0.0154 minus 3.21002
.\mark{a}
.\mark{b}

{vertical mode: \newlinechar}
{\global}
! 
ou can't use a prefix with `\unskip'.
<to be read again> 
                   \unskip 
l.345 \newlinechar`
\global\unskip
                                  \show^^
\newlinechar\lastpenalty\unpenalty...
I'll pretend you didn't say \long or \outer or \global or \protected.

{\unskip}
{\show}
> the character ^^Y.
l.345 \newlinechar`
\global\unskip\show^^

                                          \newlinechar\lastpenalty\unpenalty...


{\newlinechar}
{\unpenalty}
! You can't use `\unpenalty' in vertical mode.
l.345 ...show^^Y\newlinechar\lastpenalty\unpenalty
                                                  \unkern
Sorry...I usually can't take things from the current page.
Perhaps you can make the output routine do it.

{\unkern}
! You can't use `\unkern' in vertical mode.
l.345 ...\newlinechar\lastpenalty\unpenalty\unkern
                                                  
Sorry...I usually can't take things from the current page.
Try `I\kern-\lastkern' instead.

{\lastbox}
! You can't use `\lastbox' in vertical mode.
l.346 \lastbox
              \penalty5\message{\the\lastpenalty\the\newlinechar}\textfont16...
Sorry...I usually can't take things from the current page.
This \lastbox will therefore be void.

{\penalty}
{\message}
510000
{\textfont}
! Missing font identifier.
<to be read again> 
                   \relax 
l.346 ...enalty\the\newlinechar}\textfont16=\relax
                                                  
I was looking for a control sequence whose
current meaning has been defined by \font.

{\relax}
{\outer}
! Missing control sequence inserted.
<inserted text> 
                \inaccessible 
<to be read again> 
                   {
l.347 \outer\def{
                 }?
Please don't say `\def cs{...}', say `\def\cs{...}'.
I've inserted an inaccessible control sequence so that your
definition will be completed without mixing me up too badly.
You can recover graciously from this error, if you're
careful; see exercise 27.2 in The TeXbook.

{the character ?}
{horizontal mode: the character ?}
Missing character: There is no ? ("3F) in font trip!
{blank space  }
{\dimen}
{\showthe}
> -16383.99998pt.
l.348 \dimen5=-'7777777777sp\showthe\dimen5 
                                            % this should be OK

{\dimen}
! Dimension too large.
<to be read again> 
                   \showthe 
l.349 \dimen6=-'40000pt\showthe
                               \dimen6 % this should overflow
I can't work with sizes bigger than about 19 feet.
Continue and I'll use the largest value I can.

{\showthe}
> -16383.99998pt.
l.349 \dimen6=-'40000pt\showthe\dimen6 
                                       % this should overflow

{\dimen}
{\showthe}
> -8355.74998pt.
l.350 \dimen7=.51\dimen5\showthe\dimen7 
                                        \multiply\dimen7 2\showthe\dimen7

{\multiply}
! Arithmetic overflow.
<to be read again> 
                   \showthe 
l.350 ...showthe\dimen7 \multiply\dimen7 2\showthe
                                                  \dimen7
I can't carry out that multiplication or division,
since the result is out of range.

{\showthe}
> -8355.74998pt.
l.350 ...\dimen7 \multiply\dimen7 2\showthe\dimen7
                                                  

{undefined}
! Undefined control sequence.
l.351 \a^^@^^@a
               @ % an undefined control sequence followed by invalid character
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Text line contains an invalid character.
l.351 \a^^@^^@a@
                 % an undefined control sequence followed by invalid character
A funny symbol that I can't read has just been input.
Continue, and I'll forget that it ever happened.

{begin-group character {}
{\aftergroup}
{\aftergroup}
{\gdef}
{blank space  }
{\def}
{blank space  }

\b ->\c 

\c ->
{end-group character }}

\gobble #1->
#1<-\c 
{blank space  }
{\def}
{blank space  }
{\outer}
{\toks256}
Runaway text?
! Forbidden control sequence found while scanning text of \tokens.
<inserted text> 
                }
<to be read again> 
                   \a^^@^^@a 
l.354 ...\gdef\a^^@^^@a#1\par#2{}\tokens{\a^^@^^@a
                                                  \par!
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.


\a^^@^^@a #1\par #2->
#1<-
#2<-!
{blank space  }
{\long}
{blank space  }
{\outer}
! Parameters must be numbered consecutively.
<to be read again> 
                   8
l.356 \outer\global\long\edef\lo#1#2U3#4#5#6#7#8#8
                                                  #99#{\relax}
I've inserted the digit you should have used after the #.
Type `1' to delete what you did use.

! You already have nine parameters.
l.356 ...r\global\long\edef\lo#1#2U3#4#5#6#7#8#8#9
                                                  9#{\relax}
I'm going to ignore the # sign you just used,
as well as the token that followed it.

{blank space  }
{\ifcase}
{case 1}

\l #1->
#1<-\par 

\b #1\par ->
Runaway argument?
{
! Paragraph ended before \b was complete.
<to be read again> 
                   \par 
l.357 \ifcase 1 \undefined\or\l\par\b{\par
                                           % occurrence of \par aborts \b
I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.

{\par}

Loose \hbox (badness 22) in paragraph at lines 347--357
 []        

\hbox(0.0+0.0)x100.0, glue set 0.60527
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.


\b #1\par ->
#1<-\l \undefined 
{vertical mode: \else}
{\ifcase}
{\iftrue}
{true}
{case -1}
{\ifcase}
{\fi}
{case 5}
{\fi}
{\catcode}
{\let}
{\def}
{blank space  }
{\halign}
{internal vertical mode: \ifcase}
{case 3}
! Incomplete \ifcase; all text was ignored after line 363.
<inserted text> 
                \fi 
<to be read again> 
                   \lo 
l.363 \^^C{{\span\ifcase3 \lo
                             #\cr............89{}\cr} % runaway preamble?
A forbidden control sequence occurred in skipped text.
This kind of error happens when you say `\if...' and forget
the matching `\fi'. I've inserted a `\fi'; this might work.

Runaway preamble?
{
! Forbidden control sequence found while scanning preamble of \^^C.
<inserted text> 
                \cr }
<to be read again> 
                   \lo 
l.363 \^^C{{\span\ifcase3 \lo
                             #\cr............89{}\cr} % runaway preamble?
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Missing # inserted in alignment preamble.
<to be read again> 
                   \cr 
<inserted text> \cr 
                    }
<to be read again> 
                   \lo 
l.363 \^^C{{\span\ifcase3 \lo
                             #\cr............89{}\cr} % runaway preamble?
There should be exactly one # between &'s, when an
\halign or \valign is being set up. In this case you had
none, so I've put one in; maybe that will work.


\lo #1#2U3#4#5#6#7#8#989{->\relax {
#1<-##
#2<-\cr 
U3<-.
#4<-.
#5<-.
#6<-.
#7<-.
#8<-.
#9<-......
{vertical mode: \relax}
{begin-group character {}
{end-group character }}
{\cr}
! Misplaced \cr.
l.363 ...{\span\ifcase3 \lo#\cr............89{}\cr
                                                  } % runaway preamble?
I can't figure out why you would want to use a tab mark
or \cr or \span just now. If something like a right brace
up above has ended a previous alignment prematurely,
you're probably due for more error messages, and you
might try typing `S' now just to see what is salvageable.

{end-group character }}
! Too many }'s.
l.363 ...\span\ifcase3 \lo#\cr............89{}\cr}
                                                   % runaway preamble?
You've closed more groups than you opened.
Such booboos are generally harmless, so keep going.

{blank space  }
{\def}
! Illegal parameter number in definition of \a.
<to be read again> 
                   2
l.364 \def\a^^C1{\d#1\d\l{#2
                            }\l#1\par\a^^@^^@a#1\par# % runaway in definitio...
You meant to type ## instead of #, right?
Or maybe a } was forgotten somewhere earlier, and things
are all screwed up? I'm going to assume that you meant ##.

Runaway definition?
^^C1->\d ^^C1\d \l {##2}\l ^^C1\par 
! Forbidden control sequence found while scanning definition of \a.
<inserted text> 
                }
<to be read again> 
                   \a^^@^^@a 
l.364 \def\a^^C1{\d#1\d\l{#2}\l#1\par\a^^@^^@a
                                              #1\par# % runaway in definitio...
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.


\a^^@^^@a #1\par #2->
#1<-##1
#2<-##
{blank space  }
{\xdef}

\d #1\d ->#1#1
#1<-##1

\l #1->
#1<-##2

\l #1->
#1<-##
Runaway definition?
^^C1->^^C1^^C11\par 
! Forbidden control sequence found while scanning definition of \a.
<inserted text> 
                }
<to be read again> 
                   \a^^@^^@a 
l.365 \xdef\a^^C1{\d#1\d\l{#2}\l#1\par\a^^@^^@a
                                               #1\par# % runaway in definiti...
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.


\a^^@^^@a #1\par #2->
#1<-##1
#2<-##
{blank space  }

\T 12#101001{->-.#1pt{
Runaway argument?
! Forbidden control sequence found while scanning use of \T.
<inserted text> 
                \par 
<to be read again> 
                   \a^^@^^@a 
l.366 \T^^?a^^@^^@a
                   \par{\lo\par % runaway in use
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Use of \T doesn't match its definition.
<inserted text> 
                \par 
<to be read again> 
                   \a^^@^^@a 
l.366 \T^^?a^^@^^@a
                   \par{\lo\par % runaway in use
If you say, e.g., `\def\a1{...}', then you must always
put `1' after `\a', since control sequence names are
made up of letters only. The macro here has not been
followed by the required stuff, so I'm ignoring it.

{\par}

\a^^@^^@a #1\par #2->
#1<-
Runaway argument?
{
! Forbidden control sequence found while scanning use of \a^^@^^@a.
<inserted text> 
                \par 
<to be read again> 
                   \lo 
l.366 \T^^?a^^@^^@a\par{\lo
                           \par % runaway in use
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.


\lo #1#2U3#4#5#6#7#8#989{->\relax {
#1<-\par 
Runaway argument?
! Forbidden control sequence found while scanning use of \lo.
<inserted text> 
                \par 
<to be read again> 
                   \lo 
l.367 \lo
         \par\par\par  P  \par\par\par\par\par\par89{} \muskip3=-\thickmuskip
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.


\lo #1#2U3#4#5#6#7#8#989{->\relax {
#1<-\par 
#2<-\par 
U3<-\par 
#4<-P
#5<-\par 
#6<-\par 
#7<-\par 
#8<-\par 
#9<-\par \par 
{\relax}
{begin-group character {}
{end-group character }}
{blank space  }
{\muskip}
{\muskipdef}
{\muskip3}
{\showthe}
> 5.0mu plus 4.0mu minus 2.0mu.
l.368 ...plus \muskip3minus.5\shmip \showthe\shmip
                                                  

{begin-group character {}
{\advance}
! Incompatible glue units.
l.369 {\advance\shmip by \shkip
                               \endlinechar-1
I'm going to assume that 1mu=1pt when they're mixed.

{\endlinechar}
{\divide}
{\endlinechar}
{\global}
{\showthe}
> 0.0mu minus -0.00003fil.
l.372 \showthe\shmip
                    

{end-group character }}
{\divide}
! Arithmetic overflow.
l.374 By ^^p 
             \toks1={\a\test}
I can't carry out that multiplication or division,
since the result is out of range.

{\toks}
{blank space  }
{superscript character ^}
! Missing $ inserted.
<inserted text> 
                $
<to be read again> 
                   ^
l.375 ^
       \leaders\vrule\mskip\shmip M\leaders\hrule\nonscript\hskip\thinmuskip
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

{math shift character $}
{horizontal mode: math shift character $}
{math mode: superscript character ^}
! Missing { inserted.
<to be read again> 
                   \leaders 
l.375 ^\leaders
               \vrule\mskip\shmip M\leaders\hrule\nonscript\hskip\thinmuskip
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{\leaders}
! Leaders not followed by proper glue.
<to be read again> 
                   \mskip 
l.375 ^\leaders\vrule\mskip
                           \shmip M\leaders\hrule\nonscript\hskip\thinmuskip
You should say `\leaders <box or rule><hskip or vskip>'.
I found the <box or rule>, but there's no suitable
<hskip or vskip>, so I'm ignoring these leaders.

{\mskip}
{the letter M}
{\leaders}
! Leaders not followed by proper glue.
<to be read again> 
                   \nonscript 
l.375 ...ule\mskip\shmip M\leaders\hrule\nonscript
                                                  \hskip\thinmuskip
You should say `\leaders <box or rule><hskip or vskip>'.
I found the <box or rule>, but there's no suitable
<hskip or vskip>, so I'm ignoring these leaders.

{\nonscript}
{\hskip}
! Incompatible glue units.
l.375 ...\leaders\hrule\nonscript\hskip\thinmuskip
                                                  
I'm going to assume that 1mu=1pt when they're mixed.

{\par}
! Missing $ inserted.
<inserted text> 
                $
<to be read again> 
                   \par 
l.376 
      
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

{math shift character $}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   $
<to be read again> 
                   \par 
l.376 
      
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{math shift character $}
{horizontal mode: \par}

Loose \hbox (badness 80) in paragraph at lines 375--376
 []$[]$ 

\hbox(8.2+0.0)x100.0, glue set 0.9301
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: begin-group character {}
{\setbox}
{restricted horizontal mode: \vfill}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   \vfill 
l.377 {\setbox3\hbox{\vfill
                           \vsplit 3 0pt}
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{vertical mode: \vfill}
{\vsplit}
! Missing `to' inserted.
<to be read again> 
                   0
l.377 {\setbox3\hbox{\vfill\vsplit 3 0
                                      pt}
I'm working on `\vsplit<box number> to <dimen>';
will look for the <dimen> next.

! \vsplit needs a \vbox.
<to be read again> 
                   }
l.377 {\setbox3\hbox{\vfill\vsplit 3 0pt}
                                         
The box you are trying to split is an \hbox.
I can't split such a box, so I'll leave it alone.

{end-group character }}
{blank space  }
{\def}
! Parameters must be numbered consecutively.
<to be read again> 
                   2
l.378 \def\a#2
              {}
I've inserted the digit you should have used after the #.
Type `1' to delete what you did use.

{blank space  }
{\show}
> the letter A.
l.379 \show A
             

{blank space  }
{\show}
> \a^^@^^@a=\outer macro:
#1\par #2->.
l.380 \show\a^^@^^@a
                    

{\show}
> (=macro:
->\delimiter "4162362 .
l.381 \show (
             

{blank space  }
{\message}
{\meaning}
{\noexpand}
\long\outer macro:#1#2U3#4#5#6#7#8#989{->\relax {\lo 
{blank space  }
{\show}
> \^^C=\halign.
l.383 \show\^^C
               

{blank space  }
{\show}
> \batchmode=\batchmode.
l.384 \show\batchmode
                     

{\show}
> \error=undefined.
l.385 \show\error
                 

{\showthe}
> {\tracingcommands 0\showthe \outputpenalty \showboxbreadth 9999 \showboxdepth
 9999 \hoffset 1sp {\setbox 254=\box 255\shipout \ifvbox 2\ifhbox 254 \error \f
i 54\copy 25\fi 4} \ifvoid 254\relax \else \error \fi }.
l.386 \showthe\output
                     

{\showthe}
> 1.0mu plus 2.0fill minus 3.0mu.
l.387 \showthe\thinmuskip
                         

{\showthe}
> -2.0pt.
<recently read> \enorm 
                       
l.388 \showthe\fontdimen1\enorm
                               

{\ifx}
{false}
{\par}
{\if}
{\else}
{true}
{\else}
{\fi}
{\ifdim}
{\iftrue}
{true}
! Missing = inserted for \ifdim.
<to be read again> 
                   1
l.390 \ifdim72p\iftrue t1
                         i\fi n\fi\fi \message{\jobname\ifx\lo\lo OK}\fi
I was expecting to see `<', `=', or `>'. Didn't.

{\fi}
{\fi}
{false}
{\fi}
! Extra \fi.
l.390 \ifdim72p\iftrue t1i\fi n\fi\fi
                                      \message{\jobname\ifx\lo\lo OK}\fi
I'm ignoring this; it doesn't match any \if.

{\message}
{\jobname}
{\ifx}
{true}
tripOK
{\fi}
{\hangindent}
{begin-group character {}
{\if}
{true}
{blank space  }
{\prevgraf}
{\if}
{false}
! Bad \prevgraf (-1).
<to be read again> 
                   \relax 
l.392 ... 11 \prevgraf=-1\if 0123\error\else\relax
                                                  \fi\else\error\fi
I allow only nonnegative values here.

{\relax}
{\fi}
{\else}
{\prevgraf}
{\global}
{end-group character }}
{\showthe}
> 2.
l.393 ...af1\global\hangafter=2}\showthe\hangafter
                                                  \showthe\prevgraf

{\showthe}
> 1.
l.393 ...ter=2}\showthe\hangafter\showthe\prevgraf
                                                  

{\char}
{horizontal mode: \char}
Missing character: There is no ^^83 ("83) in font trip!
{\showthe}
> 0.
l.394 \char'203\showthe\prevgraf
                                $\indent\mark{twain}

{math shift character $}
{math mode: \indent}
{\mark}
{blank space  }
{\setbox}
{restricted horizontal mode: \vrule}
{end-group character }}
{math mode: alignment tab character &}
! Misplaced alignment tab character &.
l.395 \setbox3\hbox{\vrule}&
                            \moveleft\lastbox % can't do that in math mode
I can't figure out why you would want to use a tab mark
here. If you just want an ampersand, the remedy is
simple: Just type `I\&' now. But if some right brace
up above has ended a previous alignment prematurely,
you're probably due for more error messages, and you
might try typing `S' now just to see what is salvageable.

{\moveleft}
! You can't use `\moveleft' in math mode.
l.395 \setbox3\hbox{\vrule}&\moveleft
                                     \lastbox % can't do that in math mode
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

{\lastbox}
! You can't use `\lastbox' in math mode.
l.395 \setbox3\hbox{\vrule}&\moveleft\lastbox
                                              % can't do that in math mode
Sorry; this \lastbox will be void.

{\unhbox}
{\unhcopy}
! Incompatible list can't be unboxed.
<to be read again> 
                   \accent 
l.396 \unhbox234\unhcopy3\accent
                                \x\vfill\vfil\vfilneg\vss % \vfill exits, \v...
Sorry, Pandora. (You sneaky devil.)
I refuse to unbox an \hbox in vertical mode or vice versa.
And I can't open any boxes in math mode.

{\accent}
! Please use \mathaccent for accents in math mode.
<recently read> \accent 
                        
l.396 \unhbox234\unhcopy3\accent
                                \x\vfill\vfil\vfilneg\vss % \vfill exits, \v...
I'm changing \accent to \mathaccent here; wish me luck.
(Accents are not the same in formulas as they are in text.)

! Missing { inserted.
<to be read again> 
                   \vfill 
l.396 \unhbox234\unhcopy3\accent\x\vfill
                                        \vfil\vfilneg\vss % \vfill exits, \v...
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{\vfill}
! Missing $ inserted.
<inserted text> 
                $
<to be read again> 
                   \vfill 
l.396 \unhbox234\unhcopy3\accent\x\vfill
                                        \vfil\vfilneg\vss % \vfill exits, \v...
I've inserted a begin-math/end-math symbol since I think
you left one out. Proceed, with fingers crossed.

{math shift character $}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   $
<to be read again> 
                   \vfill 
l.396 \unhbox234\unhcopy3\accent\x\vfill
                                        \vfil\vfilneg\vss % \vfill exits, \v...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{math shift character $}
! \textfont 0 is undefined (character È).
<recently read> $
                 
<to be read again> 
                   \vfill 
l.396 \unhbox234\unhcopy3\accent\x\vfill
                                        \vfil\vfilneg\vss % \vfill exits, \v...
Somewhere in the math formula just ended, you used the
stated character from an undefined font family. For example,
plain TeX doesn't allow \it or \sl in subscripts. Proceed,
and I'll try to forget that I needed that character.

{horizontal mode: \vfill}
{\par}

Loose \hbox (badness 91) in paragraph at lines 394--396
 []$[][]$ 

\hbox(0.0+0.0)x100.0, glue set 0.97
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \vfill}
{\vfil}
{\vfilneg}
{\vss}
{\def}
! Missing { inserted.
l.397 \def\a}
             {\let\a\xyzzy\csname a\endcsname}
Where was the left brace? You said something like `\def\a}',
which I'm going to interpret as `\def\a{}'.

{begin-group character {}
{\let}
{\csname}
{\relax}
{end-group character }}
{blank space  }
{\def}
{\def}
{\let}
{\def}
{blank space  }
{\ifx}
{false}
{\expandafter}

\b ->\a \c 
{\ifx}
{true}
{\ifinner}
{false}
{\relax}
{\fi}
{\else}
{\fi}
{\ifvmode}
{true}
{math shift character $}
! Infinite glue shrinkage found on current page.
<to be read again> 
                   $
l.402 \ifvmode$
               \ifmmode\hbox tt\ifhmode\hfilneg\else\error\fi}$\fi\fi % miss...
The page about to be output contains some infinitely
shrinkable glue, e.g., `\vss' or `\vskip 0pt minus 1fil'.
Such glue doesn't belong there; but you can safely proceed,
since the offensive shrinkability has been made finite.

{horizontal mode: math shift character $}
{math mode: \ifmmode}
{true}
{\hbox}
! Missing { inserted.
<to be read again> 
                   t
<to be read again> 
                   t
l.402 \ifvmode$\ifmmode\hbox tt
                               \ifhmode\hfilneg\else\error\fi}$\fi\fi % miss...
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{restricted horizontal mode: the letter t}
{\ifhmode}
{true}
{\hfilneg}
{\else}
{end-group character }}
{math mode: math shift character $}
{horizontal mode: \fi}
{\fi}
{\noalign}
! Misplaced \noalign.
l.403 \noalign
              \omit\endcsname % these are extra
I expect to see \noalign only after the \cr of
an alignment. Proceed, and I'll ignore this case.

{\omit}
! Misplaced \omit.
l.403 \noalign\omit
                   \endcsname % these are extra
I expect to see \omit only after tab marks or the \cr of
an alignment. Proceed, and I'll ignore this case.

{\endcsname}
! Extra \endcsname.
l.403 \noalign\omit\endcsname
                              % these are extra
I'm ignoring this, since I wasn't doing a \csname.

{\fontdimen}
! Missing font identifier.
<to be read again> 
                   =
l.404 \fontdimen 1000=
                      20\varunit\showthe\fontdimen1000\trip\let\PAR=\par
I was looking for a control sequence whose
current meaning has been defined by \font.

! Font \FONT? has only 12 fontdimen parameters.
<to be read again> 
                   =
l.404 \fontdimen 1000=
                      20\varunit\showthe\fontdimen1000\trip\let\PAR=\par
To increase the number of font parameters, you must
use \fontdimen immediately after the \font is loaded.

{\showthe}
! Font \ip has only 13 fontdimen parameters.
<recently read> \trip 
                      
l.404 ...000=20\varunit\showthe\fontdimen1000\trip
                                                  \let\PAR=\par
To increase the number of font parameters, you must
use \fontdimen immediately after the \font is loaded.

> 0.0pt.
<recently read> \trip 
                      
l.404 ...000=20\varunit\showthe\fontdimen1000\trip
                                                  \let\PAR=\par

{\let}
{\gdef}
{\expandafter}
{\csname}
{\ifx}
{true}
{\mag}

\par ->\relax \PAR 
{\relax}
{\par}

Loose \hbox (badness 91) in paragraph at lines 402--406
 []$[]$ 

\hbox(0.0+0.0)x100.0, glue set 0.97
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \fi}
{\noindent}
{horizontal mode: begin-group character {}
{\halign}

\par ->\relax \PAR 
{\relax}
{\par}
{vertical mode: \halign}
! Incompatible magnification (1999);
 the previous value will be retained (2000).
l.407 \fi\noindent{\halign to 1true
                                   mm\expandafter{\csname#\endcsname#&#&\l{#...
I can handle only one magnification ratio per job. So I've
reverted to the magnification you used earlier on this run.

{internal vertical mode: \expandafter}
{\csname}
{restricted horizontal mode: \relax}
{\global}
{undefined}
! Undefined control sequence.
<recently read> \foo 
                     
<to be read again> 
                   \endtemplate 
<template> \endtemplate 
                        
l.408   \global\futurelet\endt\foo&
                                   \show\endt&$&&&.}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

{end of alignment template}
{\show}
> \endt=\outer endtemplate:
.
l.408   \global\futurelet\endt\foo&\show\endt
                                             &$&&&.}

{end of alignment template}

\l #1->
#1<-$
{end of alignment template}
! Extra alignment tab has been changed to \cr.
<template> }\endtemplate 
                         
l.408   \global\futurelet\endt\foo&\show\endt&$&
                                                &&.}
You have given more \span or & marks than there were
in the preamble to the \halign or \valign now in progress.
So I'll assume that you meant to type \cr instead.

{\relax}
{end of alignment template}
{end of alignment template}

\l #1->
#1<-.
{blank space  }

\par ->\relax \PAR 
{\relax}
{\par}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   \PAR 
l.409 
      
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
! Missing \cr inserted.
<inserted text> 
                \cr 
<to be read again> 
                   }
<to be read again> 
                   \PAR 
l.409 
      
I'm guessing that you meant to end an alignment here.

{\cr}
! Missing { inserted.
<inserted text> 
                {
<to be read again> 
                   \cr 
<to be read again> 
                   }
<to be read again> 
                   \PAR 
l.409 
      
I've put in what seems to be necessary to fix
the current column of the current alignment.
Try to go on, since this might almost work.

{begin-group character {}
{end-group character }}
{end of alignment template}

Tight \hbox (badness 1) in alignment at lines 407--409
 [] [] [] 

\hbox(0.0+0.0)x1.42262, glue set - 0.20552
.\glue(\tabskip) 0.0154 minus 3.21002
.\unsetbox(0.0+0.0)x0.0
.etc.

{vertical mode: \par}
{\hbox}
{restricted horizontal mode: \/}
{\hrule}
! You can't use `\hrule' here except with leaders.
l.410 \hbox{\/\hrule
                    \textfont3=\enorm\prevdepth\advance\xspaceskip by-\xspac...
To put a horizontal rule in an hbox or an alignment,
you should use \leaders or \hrulefill (see The TeXbook).

{\textfont}
{\prevdepth}
! You can't use `\prevdepth' in restricted horizontal mode.
l.410 \hbox{\/\hrule\textfont3=\enorm\prevdepth
                                               \advance\xspaceskip by-\xspac...
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

{\advance}
{\spacefactor}
{begin-group character {}
{blank space  }
{end-group character }}
{\everymath}
{\fontdimen}
{math shift character $}
\everymath->\radical "3
{math mode: \radical}
{end-group character }}
{\delimiterfactor}
{\left}

(->\delimiter "4162362 
{the letter A}
{the letter a}
{\right}
{math shift character $}
{restricted horizontal mode: the letter A}
{\/}
{end-group character }}
{vertical mode: blank space  }
{\openin}
{\closein}
{\iftrue}
{true}
{begin-group character {}
{\ifeof}
{true}
{\openin}
! Bad number (100).
l.413 ...s\closein 15\iftrue{\ifeof 15\openin 100 
                                                  tripos
Since I expected to read a number between 0 and 15,
I changed this one to zero.

{\def}
{blank space  }
{\catcode}
{\catcode}
{\outer}

\loop ->\ifeof 0\let \loop =\relax \else {\global \read 0to \a }\show \a \fi \l
oop 
{\ifeof}
{false}
{begin-group character {}
{\global}
{end-group character }}
{\show}
> \a=macro:
->\par .
\loop ...ax \else {\global \read 0to \a }\show \a 
                                                  \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi

{\fi}

\loop ->\ifeof 0\let \loop =\relax \else {\global \read 0to \a }\show \a \fi \l
oop 
{\ifeof}
{false}
{begin-group character {}
{\global}
Runaway definition?
->
! Forbidden control sequence found while scanning definition of \a.
<inserted text> 
                }
<read 0> \uppercase
                    {0{\outputpenalty }}
\loop ...loop =\relax \else {\global \read 0to \a 
                                                  }\show \a \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Text line contains an invalid character.
<read 0> \uppercase {0
                      {\outputpenalty }}
\loop ...loop =\relax \else {\global \read 0to \a 
                                                  }\show \a \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi
A funny symbol that I can't read has just been input.
Continue, and I'll forget that it ever happened.

{end-group character }}
{\show}
> \a=macro:
-> .
\loop ...ax \else {\global \read 0to \a }\show \a 
                                                  \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi

{\fi}

\loop ->\ifeof 0\let \loop =\relax \else {\global \read 0to \a }\show \a \fi \l
oop 
{\ifeof}
{false}
{begin-group character {}
{\global}
Runaway definition?
->[
! Forbidden control sequence found while scanning definition of \a.
<inserted text> 
                }
<read 0> [\uppercase
                     {mmmmmmmmmm}[
\loop ...loop =\relax \else {\global \read 0to \a 
                                                  }\show \a \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

Runaway definition?
->[ }{mmmmmmmmmm}[ 
! File ended within \read.
<read 0> 
         
\loop ...loop =\relax \else {\global \read 0to \a 
                                                  }\show \a \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi
This \read has unbalanced braces.

{end-group character }}
{\show}
> \a=macro:
->[ }{mmmmmmmmmm}[ \par .
\loop ...ax \else {\global \read 0to \a }\show \a 
                                                  \fi \loop 
l.415 ...015\catcode`[1\outer\def\uppercase{}\loop
                                                  }\else\fi

{\fi}

\loop ->\ifeof 0\let \loop =\relax \else {\global \read 0to \a }\show \a \fi \l
oop 
{\ifeof}
{true}
{\let}
{\else}
{\relax}
{end-group character }}
{\else}
{end-group character }}
{\def}

\test #1->\let \test = 
#1<-.
{\let}
{\show}
> \test=blank space  .
l.416 }\def\test#1{\let\test= }\test. \show\test
                                                

{\def}
{blank space  }
{\pretolerance}
{\toks256}
{\unhbox}
{horizontal mode: \unhbox}

\par ->\relax \PAR 
{\relax}
{\par}

Loose \hbox (badness 91) in paragraph at lines 418--418
 [] 

\hbox(0.0+0.0)x100.0, glue set 0.97
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \everycr}
{blank space  }
{\the}

\a #1->\ifcat #1 \message \ifx #1 {\iffalse \fi \the \tokens \fi \fi }
#1<-\test 
{\ifcat}
{true}
{\message}
{\ifx}
{true}
{\iffalse}
{false}
{\fi}
{\fi}
\a \test 
{\ifcase}
{\or}
{case 1}
{\ifeof}
{\fi}
! Missing number, treated as zero.
<to be read again> 
                   \relax 
<to be read again> 
                   \fi 
l.419 \the\tokens\ifcase1\or\ifeof\fi
                                     \def\stopinput{\error\let\input\die}
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)

{true}
{\relax}
{\fi}
{\def}
{blank space  }
{\let}
{\let}
{\halign}
{internal vertical mode: \iffalse}
{false}
\everycr->\noalign {\penalty 97}
{\penalty}
{end-group character }}
{restricted horizontal mode: \cr}
! Misplaced \cr.
<template> \cr 
               
<to be read again> 
                   \cr 
l.420 ...\span\iffalse}\fi\cr#&\ifnum0=`{\fi\cr\cr
                                                  }
I can't figure out why you would want to use a tab mark
or \cr or \span just now. If something like a right brace
up above has ended a previous alignment prematurely,
you're probably due for more error messages, and you
might try typing `S' now just to see what is salvageable.

{alignment tab character &}
! Misplaced alignment tab character &.
<template> &
            \ifnum 0=`{\fi \endtemplate 
l.420 ...\span\iffalse}\fi\cr#&\ifnum0=`{\fi\cr\cr
                                                  }
I can't figure out why you would want to use a tab mark
here. If you just want an ampersand, the remedy is
simple: Just type `I\&' now. But if some right brace
up above has ended a previous alignment prematurely,
you're probably due for more error messages, and you
might try typing `S' now just to see what is salvageable.

{\ifnum}
{\fi}
{false}
{end of alignment template}
\everycr->\noalign {\penalty 97}
{internal vertical mode: \penalty}
{end-group character }}
{vertical mode: blank space  }
{\let}
{\def}
{\def}

\unbalanced ->\halign \lb 
{\halign}
\everycr->\noalign {\penalty 97}
{internal vertical mode: \penalty}
{end-group character }}
{restricted horizontal mode: \relax}
{\expandafter}
{\expandafter}
{\expandafter}
{\expandafter}
{\expandafter}
{\expandafter}
{\expandafter}

\trap #1->
#1<-\endtemplate 
{undefined}
! Undefined control sequence.
<recently read> \err 
                     
<to be read again> 
                   \endt 
<template> \endtemplate 
                        
l.422   \relax\e\e\e\err\e\e\e\endt\e\trap\cr
                                             \noexpand\cr}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

{end of alignment template}
\everycr->\noalign {\penalty 97}
{internal vertical mode: \penalty}
{end-group character }}
{\noexpand}
{restricted horizontal mode: end of alignment template}
\everycr->\noalign {\penalty 97}
{internal vertical mode: \penalty}
{end-group character }}
{vertical mode: blank space  }

\par ->\relax \PAR 
{\relax}
{\par}
{\expandafter}
{\input}
{\endinput}
{\input}
(tripos
\stopinput ->\error \let \input \die 
{undefined}
! Undefined control sequence.
\stopinput ->\error 
                    \let \input \die 
l.1 
    
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

{\let}

\par ->\relax \PAR 
{\relax}
{\par}
)
{\relax}
{undefined}
! Undefined control sequence.
<recently read> \input 
                       
l.424 ...ter\stopinput\input tripos\endinput\input
                                                   % one line of tripos
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

{\setbox}
{internal vertical mode: \hbox}
{restricted horizontal mode: \hbox}
{\vadjust}
{internal vertical mode: the letter A}
{horizontal mode: the letter A}
{end-group character }}

Loose \hbox (badness 86) in paragraph at lines 425--425
 []\ip A 

\hbox(7.0+1.0)x100.0, glue set 0.95
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{restricted horizontal mode: end-group character }}
{end-group character }}
{internal vertical mode: end-group character }}

Underfull \vbox (badness 10000) detected at line 425

\vbox(8192.0+0.0)x0.0
.\hbox(0.0+0.0)x0.0 []

{vertical mode: \vrule}
{horizontal mode: \vrule}
{\unhbox}
! Incompatible list can't be unboxed.
<to be read again> 
                   \hrule 
l.425 ...\hbox{\vadjust{A}}}}\vrule\unhbox10\hrule
                                                  
Sorry, Pandora. (You sneaky devil.)
I refuse to unbox an \hbox in vertical mode or vice versa.
And I can't open any boxes in math mode.

{\hrule}

\par ->\relax \PAR 
{\relax}
{\par}

Loose \hbox (badness 89) in paragraph at lines 425--425
 []| 

\hbox(0.0+0.0)x100.0, glue set 0.966
.\glue(\leftskip) 3.0
.\hbox(0.0+0.0)x0.0
.etc.

{vertical mode: \hrule}
{\output}
{\futurelet}
{\maxdeadcycles}
{\show}
> \dump=the character =.
l.427 ...\futurelet\dump\maxdeadcycles=3\show\dump
                                                  

{\catcode}
{\catcode}
{\expandafter}
{\csname}
{\let}
{\relax}

\csname\endcsname {->{
! Use of \csname\endcsname doesn't match its definition.
l.429 \relax
            \catcode`\qq1qM=13 \defqqM{\relax}#\begingroup{\showboxdepth=4\s...
If you say, e.g., `\def\a1{...}', then you must always
put `1' after `\a', since control sequence names are
made up of letters only. The macro here has not been
followed by the required stuff, so I'm ignoring it.

{\catcode}
{\def}
{macro parameter character #}
! You can't use `macro parameter character #' in vertical mode.
l.429 \relax\catcode`\^^M=13 \def^^M{\relax}#
                                             \begingroup{\showboxdepth=4\sho...
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

{\begingroup}
{begin-group character {}
{\showboxdepth}
{\showbox}
> \box10=
\vbox(8192.0+0.0)x0.0
.\hbox(0.0+0.0)x0.0
..\hbox(0.0+0.0)x0.0
...\vadjust
....\hbox(7.0+1.0)x100.0, glue set 0.95 []

! OK.
<to be read again> 
                   }
l.429 ...x}#\begingroup{\showboxdepth=4\showbox10}
                                                  

{end-group character }}

^^M->\relax 
{\relax}

^^M->\relax 
{\relax}
{\long}
{\immediate}
\write->\string \caution \l 
{no mode: \string}

\l #1\l ->#1
! Argument of \l has an extra }.
<inserted text> 
                \par 
<to be read again> 
                   }
<inserted text> }
                 \endwrite 
l.431 ...#1}\immediate\write10{\string\caution \l}
                                                   % living dangerously
I've run across a `}' that doesn't seem to match anything.
For example, `\def\a#1{...}' and `\a}' would produce
this error. If you simply proceed now, the `\par' that
I've just inserted will cause me to report a runaway
argument that might be the root of the problem. But if
your `}' was spurious, just type `2' and it will go away.

Runaway argument?
! Paragraph ended before \l was complete.
<to be read again> 
                   \par 
<to be read again> 
                   }
<inserted text> }
                 \endwrite 
l.431 ...#1}\immediate\write10{\string\caution \l}
                                                   % living dangerously
I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.


\par ->\relax \PAR 
\caution\relax \PAR 
{vertical mode: blank space  }
{\escapechar}
{|tracingoutput}
{|shipout}
{internal vertical mode: |copy}
{|box}
{end-group character }}
[-2.2.-1118806.0.11.196608.327680.1572864.1073741823
! Huge page cannot be shipped out.
<recently read> }
                 
l.432 ...output0\shipout\vbox{\copy10qq5e^5cbox10}
                                                  
The page just created is more than 18 feet tall or
more than 18 feet wide, so I suspect something went wrong.

The following box has been deleted:
|vbox(16384.0+0.0)x0.0
.|vbox(8192.0+0.0)x0.0 []
.|glue(|lineskip) 0.0 plus 40.0
.etc.

]
^^M->|relax 
{vertical mode: |relax}
{|setbox}
{restricted horizontal mode: |fontdimen}
{|afterassignment}
{|advance}
! You can't use `|prevdepth' after |advance.
l.434   \afterassignment\relax\advance\prevdepth
                                                \afterassignment\relax\futur...
I'm forgetting what you said and not changing anything.

{|relax}
{|afterassignment}
{|futurelet}
{|relax}

^^M->|relax 
{|relax}
{|message}
{|noexpand}
{|meaning}
|l |long macro:#1|l ->#166
{|vbox}
{internal vertical mode: |hyphenchar}
{|-}
{horizontal mode: |-}
{| }
{the letter B}

|par ->|relax |PAR 
{|relax}
{|par}

Loose \hbox (badness 62) in paragraph at lines 436--436
 [] |ip BBBBBB 

|hbox(7.0+1.0)x100.0, glue set 0.85294
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.etc.

{internal vertical mode: |hyphenchar}
{|-}
{horizontal mode: |-}
Missing character: There is no ? ("3F) in font trip!
{| }
{the letter B}
{end-group character }}
Missing character: There is no ? ("3F) in font trip!

Loose \hbox (badness 62) in paragraph at lines 436--436
 [] |ip BBBāBBB 

|hbox(7.0+1.0)x100.0, glue set 0.85294
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.etc.

{restricted horizontal mode: |if}
{|expandafter}

|dol ->$
{|noexpand}
{true}
{|fi}
{|expandafter}
{|noexpand}
{|expandafter}
{|noexpand}
{undefined}
! Undefined control sequence.
<recently read> |undefined 
                           
<to be read again> 
                   |notexpanded: |expandafter 
l.437 ...r\noexpand\undefined\noexpand\expandafter
                                                  %
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

{|relax}
{math shift character $}
{math mode: |begingroup}
{|mathop}
{|vbox}
{internal vertical mode: |vss}
{end-group character }}
{math mode: end-group character }}
{|limits}
{superscript character ^}
! Missing { inserted.
<to be read again> 
                   |mathchoice 
l.438 ...up\mathop{\vbox{\vss}}\limits^\mathchoice
                                                  {}a}{A|{}}{\mathchoice}
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{|mathchoice}
{end-group character }}
! Missing { inserted.
<to be read again> 
                   a
l.438 ...mathop{\vbox{\vss}}\limits^\mathchoice{}a
                                                  }{A|{}}{\mathchoice}
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{the letter a}
{end-group character }}
{the letter A}
{subscript character |}
{end-group character }}
{end-group character }}
{|mathchoice}
! Missing { inserted.
<to be read again> 
                   }
l.438 ...limits^\mathchoice{}a}{A|{}}{\mathchoice}
                                                  
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{end-group character }}

^^M->|relax 
{end-group character }}
{|relax}
{begin-group character {}
{end-group character }}
{begin-group character {}
{the letter B}
{|over}
{end-group character }}
{|endgroup}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   |endgroup 
l.439   {}{\relax{}{B\over}\endgroup
                                    \showlonglists$}\showboxbreadth9\showbox...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
! Missing { inserted.
<to be read again> 
                   |endgroup 
l.439   {}{\relax{}{B\over}\endgroup
                                    \showlonglists$}\showboxbreadth9\showbox...
A left brace was mandatory here, so I've put one in.
You might want to delete and/or insert some corrections
so that I will find a matching right brace soon.
(If you're confused by all this, try typing `I}' now.)

{|endgroup}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   |endgroup 
l.439   {}{\relax{}{B\over}\endgroup
                                    \showlonglists$}\showboxbreadth9\showbox...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{|endgroup}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   |endgroup 
l.439   {}{\relax{}{B\over}\endgroup
                                    \showlonglists$}\showboxbreadth9\showbox...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{|endgroup}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   |endgroup 
l.439   {}{\relax{}{B\over}\endgroup
                                    \showlonglists$}\showboxbreadth9\showbox...
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{|endgroup}

|showlonglists ->{|tracingcommands 0|pagefillstretch -1|dimen 100 |showboxbread
th 9999 |showboxdepth 9999 |showlists |pagegoal =10000pt}
{begin-group character {}
{|tracingcommands}

### math mode entered at line 439
### math mode entered at line 438
|mathop|limits
.|vbox(0.0+0.0)x0.0
..|glue 0.0 plus 1.0fil minus 1.0fil
^|mathchoice
^T|mathord
^T.|fam1 a
^S|mathord
^S.|fam1 A
^S_{}
^s|mathchoice
^sS|mathord
^sS.{}
^sS|mathord
^sS.|fraction, thickness = default
^sS.\|mathord
^sS.\.|fam1 B
^sS./{}
|mathord
### restricted horizontal mode entered at line 433
|vbox(17.0+1.0)x100.0
.|hbox(7.0+1.0)x100.0, glue set 0.85294
..|glue(|leftskip) 3.0
..|hbox(0.0+0.0)x0.0
..|discretionary
..|glue 0.0 plus 2.0 minus 88.0
..|ip A (ligature BB)
..|kern2.0
..|ip A (ligature BB)
..|kern2.0
..|ip A (ligature BB)
..|penalty 10000
..|glue(|parfillskip) 0.0 plus 100.0
..|glue(|rightskip) 0.0
.|glue(|parskip) 0.0 plus 42.0 minus 8.0
.|glue(|baselineskip) 2.0
.|hbox(7.0+1.0)x100.0, glue set 0.85294
..|glue(|leftskip) 3.0
..|hbox(0.0+0.0)x0.0
..|discretionary
..|glue 0.0 plus 2.0 minus 88.0
..|ip A (ligature BB)
..|kern2.0
..|discretionary replacing 3
...|ip B
..||ip ā
..||ip A (ligature BB)
..||kern2.0
..||ip B
..|ip A (ligature BB)
..|kern2.0
..|ip A (ligature BB)
..|penalty 10000
..|glue(|parfillskip) 0.0 plus 100.0
..|glue(|rightskip) 0.0
spacefactor 1000
### vertical mode entered at line 0
### current page:
|glue(|topskip) 20.0 plus 1.0fil
|hbox(0.0+0.0)x100.0, glue set 0.60527
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|glue 4.0 plus 2.0 minus 88.0
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|baselineskip) 1.8
|hbox(8.2+0.0)x100.0, glue set 0.9301
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|mathon
.|hbox(0.0+0.0)x3.99, shifted -8.2
..|glue 0.0 minus -0.00003fil
..|smalltrip M
..|kern1.0
..|glue(|nonscript)
.|mathoff
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
|glue 0.0 plus 1.0fill
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x100.0, glue set 0.97
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|mathon
.|hbox(0.0+0.0)x0.0
.|hbox(0.0+0.0)x0.0
.|mathoff
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
|mark{twain}
|glue 0.0 plus 1.0fill
|glue 0.0 plus 1.0fil
|glue 0.0 plus -1.0fil
|glue 0.0 plus 1.0fil minus 1.0
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x100.0, glue set 0.97
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|mathon
.|hbox(0.0+0.0)x0.0
..|ip t
..|ip t
..|glue 0.0 plus -1.0fil
.|mathoff
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x1.42262, glue set - 0.20552
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x4.0
.|glue(|tabskip) 0.0154 minus 3.21002
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x1.42262, glue set - 0.20552
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x4.0
..|glue 4.0 plus 2.0 minus 88.0
.|glue(|tabskip) 0.0154 minus 3.21002
|glue(|lineskip) 0.0 plus 40.0
|hbox(3545.60136+140.80052)x2070.00168
.|glue 6.0 plus 4.0 minus 44.0
.|mathon
.|hbox(3545.60136+140.80052)x614.40031
..|hbox(1638.40019+409.6015)x614.40031, shifted -268.80098
...|enorm b
..|vbox(3545.60136+0.0)x0.0
...|kern1638.40019
...|rule(1638.40019+0.0)x*
...|kern268.80098
...|hbox(0.0+0.0)x0.0
.|glue(|thinmuskip) -0.00002 plus 2.0fill minus -0.00005
.|hbox(109.40036+95.40038)x1446.60138
..|vbox(-1.00002+26.9999)x7.0, shifted -20.99995
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(7.0+1.0)x3.0
....|ip A
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(-1.00002+2.0)x7.0
....|ip ^^@
...|hbox(8.0+2.0)x3.0
....|ip B
..|ip A
..|kern1.0
..|ip a
..|kern1.0
..|hbox(-204.80077+409.6015)x1433.60138, shifted -314.20113
...|enorm ^^@
.|mathoff
.|ip A (ligature AA)
.|kern 1.0
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|lineskip) 0.0 plus 40.0
|hbox(0.0+0.0)x100.0, glue set 0.97
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
|penalty 97
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x0.03079
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
|penalty 97
|penalty 97
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x0.03079
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
|penalty 97
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x0.03079
.|glue(|tabskip) 0.0154 minus 3.21002
.|hbox(0.0+0.0)x0.0
.|glue(|tabskip) 0.0154 minus 3.21002
|penalty 97
|glue(|parskip) 0.0 plus 42.0 minus 8.0
|glue(|baselineskip) 10.0
|hbox(0.0+0.0)x100.0, glue set 0.966
.|glue(|leftskip) 3.0
.|hbox(0.0+0.0)x0.0
.|rule(*+*)x0.4
.|penalty 10000
.|glue(|parfillskip) 0.0 plus 100.0
.|glue(|rightskip) 0.0
total height 3796.40189 plus 332.0 plus 2.0fil plus -803.0fill minus 49.0
 goal height 16383.99998
### recent contributions:
|rule(0.4+0.0)x*
prevdepth ignored, prevgraf 1 line

! OK.
|showlonglists ...9 |showboxdepth 9999 |showlists 
                                                  |pagegoal =10000pt}
l.439   {}{\relax{}{B\over}\endgroup\showlonglists
                                                  $}\showboxbreadth9\showbox...


{math shift character $}
{restricted horizontal mode: end-group character }}
{vertical mode: |showboxbreadth}
{|showboxdepth}

^^M->|relax 
{|relax}
{|showbox}
> \box9=
|hbox(19.6+1.0)x100.98999
.|vbox(17.0+1.0)x100.0
..|hbox(7.0+1.0)x100.0, glue set 0.85294
...|glue(|leftskip) 3.0
...|hbox(0.0+0.0)x0.0
...|discretionary
...|glue 0.0 plus 2.0 minus 88.0
...|ip A (ligature BB)
...|kern2.0
...|ip A (ligature BB)
...|kern2.0
...|ip A (ligature BB)
...etc.
..|glue(|parskip) 0.0 plus 42.0 minus 8.0
..|glue(|baselineskip) 2.0
..|hbox(7.0+1.0)x100.0, glue set 0.85294
...|glue(|leftskip) 3.0
...|hbox(0.0+0.0)x0.0
...|discretionary
...|glue 0.0 plus 2.0 minus 88.0
...|ip A (ligature BB)
...|kern2.0
...|discretionary replacing 3
....|ip B
...||ip ā
...||ip A (ligature BB)
...||kern2.0
...||ip B
...|ip A (ligature BB)
...|kern2.0
...etc.
.|mathon
.|vbox(19.6+0.0)x0.99
..|kern10.0
..|hbox(3.5+4.1)x0.99
...|smalltrip A
...|hbox(0.0+0.0)x-0.01, shifted 4.1
..|kern2.0
..|hbox(0.0+0.0)x0.99, glue set 0.49501fil
...|glue 0.0 plus 1.0fil minus 1.0fil
...|vbox(0.0+0.0)x0.0
....|glue 0.0 plus 1.0fil minus 1.0fil
...|glue 0.0 plus 1.0fil minus 1.0fil
.|glue(|thinmuskip) -0.00002 plus 2.0fill minus -0.00005
.|hbox(0.0+0.0)x0.0
.|mathoff

! OK.
<to be read again> 
                   |PAR 
l.440 \showbox9\PAR
                   {\output{}\penalty-10001\deadcycles=2}\scrollmode%

{|par}
{begin-group character {}
{|output}
{|penalty}
[-2.2.-1118806.0.11.196608.327680.1572864.1073741823]
{|deadcycles}
{end-group character }}
{|scrollmode}

{|hbox}
{restricted horizontal mode: |write}
{|showlists}

### restricted horizontal mode entered at line 441
|write-{|if 01{|else unbal}|fi }
spacefactor 1000
### vertical mode entered at line 0
prevdepth ignored, prevgraf 1 line

! OK.
l.441 ...e-100000{\if01{\else unbal}\fi}\showlists
                                                  \tracingonline1%

{|tracingonline}
{|escapechar}
{^^?global}
{^^?global}
{Āend}
! Missing } inserted.
<inserted text> 
                }
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  
I've inserted something that you may have forgotten.
(See the <inserted text> above.)
With luck, this will get me unwedged. But if you
really didn't forget anything, try typing `2' now; then
my insertion and my current dilemma will both disappear.

{end-group character }}
{vertical mode: Āend}
Āoutput->{Āshowthe Ādeadcycles Āglobal Āadvance Ācountz by1Āglobal Āglobaldefs 
-1 Āgdef Ālocal {}Āunvbox 255Āend Ārb }
{internal vertical mode: Āshowthe}
> 3.
<output> {Āshowthe Ādeadcycles 
                               Āglobal Āadvance Ācountz by1Āglobal Āglobalde...
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  

{Āglobal}
{Āglobal}
{Āgdef}
{Āunvbox}
{Āend}
! You can't use `Āend' in internal vertical mode.
<recently read> Āend 
                     
<output> ...efs -1 Āgdef Ālocal {}Āunvbox 255Āend 
                                                  Ārb }
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.

{end-group character }}
! Unbalanced output routine.
<output> ...-1 Āgdef Ālocal {}Āunvbox 255Āend Ārb 
                                                  }
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  
Your sneaky output routine has problematic {'s and/or }'s.
I can't handle that very well; good luck.

{vertical mode: Āend}
! Output loop---3 consecutive dead cycles.
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  
I've concluded that your \output is awry; it never does a
\shipout, so I'm shipping \box255 out myself. Next time
increase \maxdeadcycles if you want me to be more patient!


Completed box being shipped out [-1.2.-1118806.0.11.196608.327680.1572864.10737
41823]
Āvbox(16383.99998+0.0)x100.0, glue set 8182.0fill
.Āglue(Ātopskip) 20.0 plus 1.0fil
.Āhbox(0.0+0.0)x0.0
..Āwrite-{Āif 01{Āelse unbal}Āfi }
.Āhbox(0.0+0.0)x100.0
.Āglue 0.0 plus 1.0fill
.Āpenalty 10000
.Āhbox(0.0+0.0)x100.0
.Āglue 0.0 plus 1.0fill

Āwrite->Āif 01{Āelse unbal}Āfi 
{no mode: Āif}
{false}

! Unbalanced write command.
<write> Āif 01{Āelse unbal}Āfi 
                               
<inserted text> 
                }Āendwrite 
<to be read again> 
                   Āend 
l.442 ...l\tracingoutput1\global\escapechar256\end
                                                  
On this page there's a \write with fewer real {'s than }'s.
I can't handle that very well; good luck.

unbal
{vertical mode: Āend}
 )
(Āend occurred inside a group at level 1)

### semi simple group (level 1) entered at line 429 (Ābegingroup)
### bottom level
(Āend occurred when Āif on line 442 was incomplete)
(Āend occurred when Āifcase on line 419 was incomplete)
(Āend occurred when Āiftrue on line 413 was incomplete)
Output written on trip.xdv (16 pages, 3256 bytes).