Tried the CommConnect.t program which comes with MacPerl v5.13r2. Got the following: # Undefined subroutine &MacPerl::DebugExternals called. File 'Jedi:Applications:MacPerl D:t:mac:CommConnect.t'; Line 10 from the line which reads: &MacPerl'DebugExternals(1); So I commented the line out thinking that maybe it was a left-over statement from when Matthias was editing/debugging MacPerl. And I got: Error: unable to prepare for use (InitCM error). Error: CommConnect was not prepared for use. Error: CommConnect was not prepared for use. $$$Error: CommConnect was not prepared for use. So I was wondering if the line should have been left in and/or what was the matter with the program itself. :-) I'm running on a Mac IIfx using the BIG MacPerl copy (properly installed after installing the normal MacPerl release) and 32mb of memory. Thanks!