problem with texexec and inline metapost

["Eckhart Guthöhrlein" <eckhart_guthoehrlein@public.uni-hamburg.de>]

When running texexec over my input file containing a metapost graphic 
(first time, no mpgraph files exist), metapost is called after the first 
run, but then tex is not called again. Therefore, I have to call texexec 
twice to actually get the graphics in my dvi file. Accordingly, changes to 
the mp code become effective only after the second call to texexec (when 
creating pdf. - the dvi driver of course finds the updated file after the 
first run). I thought texexec would do this job for me, so perhaps there is 
a switch I didn't see yet?
When I enable \write18 and \runMPgraphicstrue, creating graphics during 
runtime works fine. But I would prefer to have \write18 disabled.
I tried 'texexec --mptex xyz', but then texexec just quits after its 
version message, doing nothing else. ?
I'm using the latest version of context/texexec together with miktex 2.1. 
Maybe I should just take a break, but I don't see what I have left to try.

Eckhart