Brian, Your best avenue for information about GEMVIS is probably the gembud email list, since gemvis is not a Unidata application. Due to the significant changes in the GEMPAK grid library in the past few years, it is unlikely that an old version of the software would be compatible with the GEMPAK library routines without some modification for the current GEMPAK distribution. Steve Chiswell Unidata User Support Ticket Details =================== Ticket ID: ZNP-741791 Department: Support GEMPAK Priority: Critical Status: Closed