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I am using Miktex 2.9 (64-bit) and TexnicCenter when compiling Metapost (version 1.504). My files will compile fine without labels. When I try to add a tex label, metapost crashes. I NEED HELP PLEASE!

Also, when compiling it is generating files with filenames like'mp755048' which have a .tex, .dvi, and .txt associated with the filename. The .dvi file contains the latex label by itself. The text file contains:

This is TeX, Version 3.1415926 (MiKTeX 2.9) (preloaded format=tex 2012.3.18)  1 FEB   2013 16:44
**mp755048.tex
("C:\Users\Documents\Research\Thesis - Paper 2\Graphs\mp755048.tex"
! Undefined control sequence.
l.2 \documentclass
              {article}
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.

! Undefined control sequence.
l.3 \begin
      {document}
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.

[1] [1] )
Output written on mp755048.dvi (2 pages, 340 bytes).

A minimal example that fails:

prologues :=3;
verbatimtex
%&latex
\documentclass{article}
\begin{document}
etex

beginfig(1);
    label(btex $x$ etex, origin);
endfig;
end;
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Welcome to TeX.sx! I get an error regarding the misplaced word "vertices" (that I believe should go before etex), but once corrected I have no problem. –  egreg Feb 1 '13 at 21:30
    
I had a feeling my code would work for others. I think there is something wrong with the programs files. I have already re-installed Miktex. Any other suggestions? –  Jonelle Feb 1 '13 at 21:41
    
Can you try making a really minimal example that fails? The shorter is the code, the easier is to find the problem. –  egreg Feb 1 '13 at 21:43
    
Yes. Even this crashes: prologues :=3; verbatimtex %&latex \documentclass{article} \begin{document} etex beginfig(1); label(btex $x$ etex, origin); endfig; end; –  Jonelle Feb 1 '13 at 21:44
1  
@jonelle: and is the generated output correct? –  Aditya Feb 2 '13 at 4:56

1 Answer 1

I had exactly the same problem. My initial workaround was to cut and paste mp code into Troy Henderson's MetaPost Previewer (http://www.tlhiv.org/mppreview/), which worked magnificently. Code that compiled and ran there would not run and generated the same error messages as above. Not happy with that situation, I found this link (https://groups.google.com/forum/?hl=en&fromgroups=#!topic/fr.comp.text.tex/ilcOWIxWcP4) which is in French but includes a Google translator if you are so inclined. I followed the 12 step procedure outlined, and while I was in the MikTeX Options (Admin) program on the Formats tab, I noticed the mptopdf key was excluded, so I re-enabled this. After updating formats, MetaPost ran without a hitch! One problem relegated to the ash-heap of history. Since I changed a few things simultaneously, I'm not sure which was the culprit. At this point, I'm just happy to have a working MP system. Regards

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