Re: We have a problem --- Old file no longer compiles

[David Arnold <dwarnold45@suddenlink.net>]

Here is another example, this time not within a block, but within an  
enumeration again:

The source:

\startproperty
   Let $a$ and $b$ be any numbers such that $a=b$. Then, if $c$ is  
any number other than zero,

\placeformula[-]
\startformula
   ac=bc.\index{equations+multiplication}
\stopformula

If $c$ is any number other than zero, then

\placeformula[-]
\startformula
   \frac ac=\frac bc.\index{equations+division}
\stopformula

\stopproperty

Where property is defined:

\defineframedtext[MyBox]
\definemeasure[BoxWidth][\textwidth]
\defineblank[BoxBlank][medium]

\setupframedtexts
	[MyBox]
	[width=\measure{BoxWidth},
	before={\blank[BoxBlank]},
	after={\blank[BoxBlank]},
	background=color,
	frame=no,
	location=middle]

\setuplabeltext[property=Property]

\defineenumeration
	[Default]
	[location=serried,
	width=broad,
	text=\labeltext{},
	headstyle=bold,
	inbetween=\blank,
	before=\blank,
	after=\blank,
	way=bysection,
	sectionnumber=no,
	number=yes,
	right=.]

\defineenumeration
	[property]
	[Default]
	[text=\labeltext{property},
	before={\startMyBox[backgroundcolor=lavender]},
	after=\stopMyBox,
	way=bysection,
	sectionnumber=no]


And the error. Again, the \frac command seems to be the culprit.


(./EquationsSection.tuo) [1.15] [MP to PDF] (./EquationsSection- 
mpgraph.1)
[2.16] [3.17]
! Missing number, treated as zero.
<to be read again>
                    \relax
\dogenfrac ...{\begingroup #4\endgroup #2#3\relax
                                                   #5}}
\mathematics #1->\relax \ifmmode #1
                                    \else $#1$\fi
l.275   \frac ac
                 =\frac bc.\index{equations+division}
?


On Jul 4, 2007, at 12:30 PM, David Arnold wrote:

> Hi,
>
> In setting out to update our intermediate algebra textbook for the
> fall semester (http://msenux.redwoods.edu/IntAlgText/), I've found
> that a file that would formerly compile under a previous version of
> context will no longer compile.
>
> Preliminaries $ ctxtools --contextversion
> CtxTools | context version: 2007.06.06 09:53 (/usr/local/gwTeX/
> texmf.local/tex/context/base/context.tex)
> CtxTools | context version: 2007.06.06 09:53 (/usr/local/gwTeX/
> texmf.local/tex/context/base/cont-new.tex)
>
> Preliminaries $ texmfstart texexec --version
> TeXExec | version 6.2.0 - 1997-2006 - PRAGMA ADE/POD
>
> The error message I receive is:
>
> textblocks      : reading blocks from NumberSystemsExercises.tub
> (./NumberSystemsExercises.tub
> textblocks      : shortanswer loaded and typeset
> textblocks      : shortanswer loaded and processed
> textblocks      : shortanswer loaded and typeset
> textblocks      : shortanswer loaded and processed
> textblocks      : shortanswer loaded and typeset
> textblocks      : shortanswer loaded and processed
> textblocks      : shortanswer loaded and typeset
> textblocks      : shortanswer loaded and processed
> textblocks      : shortanswer loaded and typeset
> ! Missing number, treated as zero.
> <to be read again>
>                     \relax
> \dogenfrac ...{\begingroup #4\endgroup #2#3\relax
>                                                    #5}}
> \mathematics #1->\relax \ifmmode #1
>                                     \else $#1$\fi
> l.216 $ \frac{81}{125}
>                        $
> ?
>
> The point in the source that seems to cause the difficulty is:
>
> \noindent In \in{Exercises}[ex:secqu.9]-\in[ex:secqu.16],
> convert the given decimal to a fraction.
>
> % Exercise #9
> \beginquestion
> \startquestion[ex:secqu.9]
> $0.648$
> \stopquestion
> \endquestion
>
> \beginlonganswer
> \startanswer
> There are three decimal places, so
> $0.648=\frac{648}{1000}=\frac{81}{125}$.
> \stopanswer
> \endlonganswer
>
> \beginshortanswer
> \startanswer
> $\displaystyle \frac{81}{125}$
> \stopanswer
> \endshortanswer
>
> Shortanswer and longanswer are blocks. Startanswer is an enumeration.
> I've tried this in other files and gotten similar errors, which seem
> to be tied to the frac command.
>
> Can anyone help?
> ______________________________________________________________________ 
> _____________
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>
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> ______________________________________________________________________ 
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