Again: MetaPost calling TeX

[Johannes Huesing <hannes@ruhrau.de>]

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Hi all,

again I have problems with btex .. etex constructs within MetaPost
files. Skimming old list messages I saw that this is often due to
versions of ConTeXt and TeXExec out of sync. This was the case indeed
so I installed the version of TeXExec that came with my ConTeXt (which
I fetched ojn March 28th. After that, the messages "could not make mpx
file" disappeared. Instead, I get messages of the kind that are
attached along with a minimal example that led to the error message.

What am I doing wrong?

Groetjes

Johannes
-- 
Johannes Hüsing | Domain: Adresse im Internet. Besteht aus einem 
hannes@ruhrau.de| technischen Teil (http://www.), einem Namen 
                | (erwin_meier) und einer Endung  (zum Beispiel 
                | .de für Deutschland) [J. Albrecht, "Zeit" 12/2001]

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\setupoutput[pdftex]
\runMPgraphicstrue

\starttext
\startuseMPgraphic{kante}
u=12pt;

pair p[];

p1 = (2u,0u);
p2 = (1u,2u);

label.top(btex $e_1$ etex, p1);
label.top(btex $e_2$ etex, p2);
label.top(btex $(e_1, e_2)$ etex, subpath 0.5 of p1--p2);
drawarrow p1--p2;
\stopuseMPgraphic

\placefigure[here]{15 Mann auf des toten Mannes Kiste}{\useMPgraphic{kante}}

yo ho ho und ne buddel rum

\stoptext

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This is pdfeTeX, Version 3.14159-13h-pretest-20010126-2.1 (Web2C 7.3.3.1) (format=cont-en 2001.3.31)  17 JUN 2001 21:38
**&cont-en minimal.tex
(./minimal.tex{/usr/share/texmf/pdftex/config/pdftex.cfg}

ConTeXt  ver: 2001.3.27  fmt: 2001.3.31  int: english  mes: english

language       : language en is active
system         : cont-new loaded
(/usr/local/share/texmf/tex/context/base/cont-new.tex <unprotect 2>
systems        : beware: some patches loaded from cont-new.tex!
<protect 2>)
system         : cont-old loaded
(/usr/local/share/texmf/tex/context/base/cont-old.tex
loading        : Context Old Macros
<unprotect 2> <protect 2>)
system         : cont-fil loaded
(/usr/local/share/texmf/tex/context/base/cont-fil.tex
loading        : Context File Synonyms
)
bodyfont       : 12pt rm is loaded
language       : patterns 2-en-2 2-uk-2 2-de-2 2-fr-2 loaded
specials       : tex,postscript,rokicki loaded
\openout2 = `minimal.tui'.

system         : minimal.top loaded
(./minimal.top <unprotect 2> <protect 2>) (./minimal.tuo) (./minimal.tuo)
(./minimal.tuo) (./minimal.tuo) (./minimal.tuo) (./minimal.tuo) (./minimal.tuo)
(./minimal.tuo) (./minimal.tuo) (./minimal.tuo)
\openout1 = `mpgraph.mp'.

specials       : tex,postscript,rokicki is reset
specials       : loading definition file tpd
(/usr/local/share/texmf/tex/context/base/spec-tpd.tex <unprotect 2>
specials       : loading definition file fdf
(/usr/local/share/texmf/tex/context/base/spec-fdf.tex <unprotect 3>
<unprotect 4> <protect 4> <protect 3>)
specials       : fdf loaded
<unprotect 3> <protect 3> <protect 2>)
specials       : fdf,tpd loaded
(./minimal.tuo) (./minimal.tuo)
systems        : begin file minimal at line 4
\openout1 = `mpgraph.mp'.

Randomizer initialized to 1520416030.
system(mpost mpgraph)...executed.

 [MP to PDF mpgraph.1] (./mpgraph.1)
! Missing number, treated as zero.
<to be read again> 
                   \relax 
\dopreparestackcaptionaut ...ptionminwidth \relax 
                                                  \captionminwidth \else \wd...

\doifelse ...esstest \ifx \!!stringa \!!stringb #3
                                                  \else #4\fi 
<argument> ...des toten Mannes Kiste}{\v!figuur }}
                                                  \else \dopreparestackcapti...

\doifelse ...\ifx \!!stringa \!!stringb #3\else #4
                                                  \fi 
\doifinsetelse ...doifinsetelse {#1}{#2}#3\else #4
                                                  \fi 
...
l.19 ... toten Mannes Kiste}{\useMPgraphic{kante}}

? x

Here is how much of TeX's memory you used:
 859 strings out of 28193
 11381 string characters out of 342592
 348671 words of memory out of 1100001
 25683 multiletter control sequences out of 10000+25000
 9056 words of font info for 28 fonts, out of 400000 for 1000
 22 hyphenation exceptions out of 1000
 26i,5n,59p,181b,364s stack positions out of 1500i,500n,1500p,50000b,5000s
No pages of output.