Problem using mptopdf with Metapost containing LaTeX

[Martin Buchmann <Martin.Buchmann@uni-jena.de>]

Hi,

I am not really a ConTeXt user but use the mptopdf script to convert my 
mp drawings directly into pdf which was working great in the past. 
Yesterday and the day before i updated my TeX system using Gerben's 
i-Installer to the new gwTeX foundation and to the latest ConTeXt beta 
and since then I get an error if my Metapost file contains LaTeX control 
sequences:

> MPtoPDF 1.3.2 : running 'texexec --mptex '
> TeXExec | processing graphic 'mp-minimal.mp'
> TeXExec | using internal mptotex converter
> TeXExec | processing document 'mp-minimal-temp.tex'
> TeXExec | no ctx file found
> TeXExec | tex processing method: context
> TeXExec | writing option file mp-minimal-temp.top
> TeXExec | using randomseed 1177
> TeXExec | tex engine: pdfetex
> TeXExec | tex format: cont-en
> This is pdfTeX, Version 3.141592-1.40.0-rc4 (Web2C 7.5.5)
>  (/usr/local/gwTeX/texmf.pkgs/web2c/natural.tcx)
> entering extended mode
> (./mp-minimal-temp.tex
> 
> ConTeXt  ver: 2007.01.02 13:44 MK II  fmt: 2007.1.3  int: english/english
> 
> language        : language en is active
> system          : cont-new loaded
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/cont-new.tex
> systems         : beware: some patches loaded from cont-new.tex
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/cont-new.mkii))
> system          : cont-old loaded
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/cont-old.tex
> loading         : Context Old Macros
> )
> system          : cont-fil loaded
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/cont-fil.tex
> loading         : Context File Synonyms
> )
> system          : cont-sys.rme loaded
> (/usr/local/gwTeX/texmf.pkgs/tex/context/user/cont-sys.rme
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-exa.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-syn.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-enc.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-siz.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-map.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-spe.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/type-akb.tex))
> bodyfont        : 12pt rm is loaded
> language        : patterns en->ec:ec->1->2:3 uk->ec:ec->2->2:3 de->texnansi:tex
> nansi->3->2:3 de->ec:ec->4->2:3 fr->texnansi:texnansi->5->2:3 fr->ec:ec->6->2:3
>  es->ec:ec->7->2:3 pt->texnansi:texnansi->8->2:3 pt->ec:ec->9->2:3 it->texnansi
> :texnansi->10->2:3 it->ec:ec->11->2:3 nl->texnansi:texnansi->12->2:3 nl->ec:ec-
>>13->2:3 cz->il2:il2->14->2:3 cz->ec:ec->15->2:3 sk->il2:il2->16->2:3 sk->ec:ec
> ->17->2:3 pl->pl0:pl0->18->2:3 pl->ec:ec->19->2:3 pl->qx:qx->20->2:3 loaded
> specials        : tex,postscript,rokicki loaded
> system          : mp-minimal-temp.top loaded
> (./mp-minimal-temp.top
> specials        : loading definition file dvi
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/spec-dvi.tex)
> specials        : tex loaded
> specials        : loading definition file ps
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/spec-ps.tex)
> specials        : tex,postscript loaded
> specials        : loading definition file tr
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/spec-tr.tex)
> specials        : tex,postscript,rokicki loaded
> )
> systems         : system commands are disabled
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/sort-def.tex)
> (/usr/local/gwTeX/texmf.pkgs/tex/context/base/sort-lan.tex)
> systems         : begin file mp-minimal-temp at line 42
> ! Undefined control sequence.
> l.44 \documentclass
>                    [12pt,a4paper]{article}
> ?
> ! Emergency stop.
> l.44 \documentclass
>                    [12pt,a4paper]{article}
> No pages of output.
> Transcript written on mp-minimal-temp.log.
> TeXExec | runtime: 0.529086
> This is MetaPost, Version 0.993 (Web2C 7.5.5)
> (/usr/local/gwTeX/texmf.pkgs/web2c/natural.tcx)
> (mp-minimal.mp
>>> mp-minimal.mp
>>> mp-minimal.mpx
> ! Unable to make mpx file.
> l.9   label(btex
>                  Test etex, (1,1) );
> Transcript written on mp-minimal.log.
> TeXExec | runtime: 0.865779
> 
> MPtoPDF 1.3.2 : no filename matches mp-minimal  

Here is my minimal example:

prologues:=2;
verbatimtex
\documentclass[12pt,a4paper]{article}
\begin{document}
etex

beginfig(1);

   label(btex Test etex, (1,1) );

endfig;
end

I tried to understand which script is actual called when i call mptopdf 
but got kind of lost in the sequence of shell script calling ruby 
scripts calling perl scripts, etc. So, I wasn't able to find out the 
right command line options, etc. for making mpost aware of calling latex 
instead of tex. Can someone help me out here?

Best regards
   Martin

-- 
If you didn't get caught, did you really do it?