I'm afraid this one has me stumped right now. The oalib Makefile contains the same "ar rv" command that's being executed in other directories, but for an unknown reason it's just not being executed. The simple workaround is to cd into $GEMPAK/source/oalib/ and type "ar rv $OS_LIB/gemlib.a *.o" - but this addresses the symptom of the problem and not the cause. -mj Ticket Details =================== Ticket ID: BLG-266408 Department: Support GEMPAK Priority: Normal Status: Open