Hi,

> Well, you should post a *complete* and *minimal* examplefile showing
> your problem, together with the context/metafun version numbers (or
> logfile). This way emails like the last one can be avoided and the
> others can try to reproduce the problem without hassle.

okay, sorry for that. I've included a simple test file and the 
corresponding *.log files. The error message can be found in the 
tmpgraph.log file. I'm using the i-Installer teTeX distribution with 
the main TeX package dating from 2004/05/05.

Best regards,
Sebastian