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From: marcus@ecrc.de (Marcus Clemente)
Newsgroups: comp.text.tex
Subject: LaTeX question: \ref in \caption
Keywords: figure caption reference
Message-ID: <1991Jun3.150330.21344@ecrc.de>
Date: 3 Jun 91 15:03:30 GMT
References: <22457@paperboy.OSF.ORG>
Sender: news@ecrc.de
Reply-To: marcus@ecrc.de (Marcus Clemente)
Organization: ecrc
Lines: 86

Hello,

I want to refer to a figure in the caption of another figure. LaTeX runs fine
on the first run, but crashes the second run. Is there any LaTeX specialist
being able to tell me how to do it?

Following is a sample code as well as the output of TeX:

%%%%%%%%%%%%  try.tex %%%%%%%%%%%

\documentstyle{article}
\begin{document}

Here is the first figure

\begin{figure}[htp]
an example
\caption{example}
\label{example}
\end{figure}

and this is the second figure with the reference

\begin{figure}[htp]
another example
\caption{another example of figure \ref{example}}
\label{another}
\end{figure}

\end{document}


%%%%%%%%%%% TeX run %%%%%%%%%%%

europa1( ~/tmp ) 8 -> latex try.tex
This is TeX, C Version 2.95 (no format preloaded)
(try.tex
LaTeX Version 2.09 <4 Aug 1988>
(/usr/local/lib/tex/inputs/article.sty
Document Style `article' <16 Mar 88>.
(/usr/local/lib/tex/inputs/art10.sty))
No file try.aux.
LaTeX Warning: Reference `example' on page 1 undefined.
[1] (try.aux)
LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.
Output written on try.dvi (1 page, 496 bytes).
Transcript written on try.log.
europa1( ~/tmp ) 9 -> latex try.tex
This is TeX, C Version 2.95 (no format preloaded)
(try.tex
LaTeX Version 2.09 <4 Aug 1988>
(/usr/local/lib/tex/inputs/article.sty
Document Style `article' <16 Mar 88>.
(/usr/local/lib/tex/inputs/art10.sty)) (try.aux)
! Argument of \@caption has an extra }.
<inserted text>
                \par
<to be read again>
                   }
\addcontentsline ...\protect \contentsline {#2}{#3
                                                  }{\the \@temptokena }}}}\@...

\@caption ... the#1\endcsname }{\ignorespaces #2}}
                                                  \begingroup \@parboxrestor...
l.19 ...n{another example of figure \ref{example}}

? h
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.

?

--
Marcus Clemente                          Internet: marcus@ecrc.de
ECRC GmbH     
Arabella Str. 17
D 8000 Munich 81                         Tel.:  +49/089/92699-109
Germany 

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