[NTG-context] texexec (and context) stops when using \externalocp

Trying to get some sort of 'implicit' bidi with luatex, I though of using an (extenal) OCP filter as it is much easier than messing with luatex nodes, and it respects TeX grouping. The attached example loads the do_bidi.py script as an \externalocp, it works fine with plain luatex, but not with 'texexec', using 'context' I get: MtxRun | fatal error, message: luatex: execution interrupted Any ideas? Is there a lua equivalent to \externalocp ? Regards, Khaled -- Khaled Hosny Arabic localizer and member of Arabeyes.org team