I guess another post on this subject didn't make it out. In summary, though, I have an XS module which sailed through the approved build process (h2xs, perl Makefile.PL, BuildProgram all and BuildProgram install). It also passes Check Syntax in MacPerl in a small test script. When running it, though, I get error 12 - unimplemented core routine - after MacPerl implodes. I'm curious: how do i figure this one out? I wrote another quick XSUB from scratch after this happened, and took it all the way through the process. It ran fine. TIA. Arved ***** Want to unsubscribe from this list? ***** Send mail with body "unsubscribe" to mac-perl-request@iis.ee.ethz.ch