Re: btex and etex

["Johannes Hüsing" <hannes@ruhrau.de>]

On Mon, Sep 25, 2000 at 09:13:46AM +0200, Hans Hagen wrote:
[...]
> The btex/etex method is a tricky one. In your case, mpost still tries to
> locate an mpx file. 
> 

Indeed, I have tried to run the following file:

----
%\setupoutput[pdftex]
\runMPgraphicstrue
\starttext

\startuseMPgraphic{location}
u := 10pt;
v := 14pt;

draw (0u, 0v);
label.top(btex Amsterdam etex, (0u, 0v));

draw (2.4u, 2v);
label.top(btex Groningen etex, (2.4u, 2v));

draw (1.2u, 0.8v);
label.top(btex Hasselt etex, (2.4u, 0.8v));
\stopuseMPgraphic

\useMPgraphic{location}
\stoptext
----

The error message on the mpost run reads:

----
This is MetaPost, Version 0.641 (Web2C 7.3.3.1)
(minimalMP-mpgraph.mp
! mpx file ended unexpectedly.
l.22 
----

> Try the latest context (esp texexec) since it implements a slightly
> different cycle, 

Let's see: My texexec version is 2.5. The ConTeXt version stems from 
2002.03.27.

[...]
> 
> How does 'mpost myfile.mp' perform? That should use the (buggy) method
> coded in texmf.cnf. 

If I run mpost on the generated Metapost inclusion, I get:

----
This is MetaPost, Version 0.641 (Web2C 7.3.3.1)
(minimalMP-mpgraph.mp (/usr/local/TeX/texmf-local/metapost/context/mp-tool.mp)
(/usr/local/TeX/texmf-local/metapost/context/mp-spec.mp)
(/usr/local/TeX/texmf-local/metapost/context/mp-grph.mp)
(/usr/local/TeX/texmf-local/metapost/context/mp-page.mp)
(/usr/local/TeX/texmf-local/metapost/context/mp-core.mp)/usr/local/bin/makempx: Command failed: tex mpxerr.tex; see mpxerr.log

>> minimalMP-mpgraph.mp
>> minimalMP-mpgraph.mpx
! Unable to make mpx file.
l.91 label.top(btex
                    Amsterdam etex
Transcript written on minimalMP-mpgraph.log.
----

The mpxerr.tex file reads:

----
\global \loadfontfileoncetrue%
\shipout\hbox{\smash{\hbox{\hbox{% line 91 minimalMP-mpgraph.mp
Amsterdam}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 94 minimalMP-mpgraph.mp
Groningen}\vrule width1sp}}}
\shipout\hbox{\smash{\hbox{\hbox{% line 97 minimalMP-mpgraph.mp
Hasselt}\vrule width1sp}}}
\end{document}
----

and the associated log file:

----This is TeX, Version 3.14159 (Web2C 7.3.3.1) (format=tex 2002.2.24)  14 APR 2002 08:46
**mpx1091.tex
(./mpx1091.tex
! Undefined control sequence.
l.1 \global \loadfontfileoncetrue
                                 %
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.

! You can't use a prefix with `\shipout'.
<to be read again> 
                   \shipout 
l.2 \shipout
            \hbox{\smash{\hbox{\hbox{% line 91 minimalMP-mpgraph.mp
I'll pretend you didn't say \long or \outer or \global.

[1] [1] [1] )
Output written on mpx1091.dvi (3 pages, 352 bytes).
---

What is hppening here?

Greetings

Johannes
-- 
Johannes Hüsing   There is something fascinating about science. One gets
hannes@ruhrau.de  such wholesale returns of conjecture from such a 
                  trifling investment of fact.                Mark Twain