Steve, > udunits.inc and readgeneral*.F are attached. The trial 2 "udunits.inc" file contained this: c #define UD_POINTER integer*4 Because the directive is disabled, the C preprocessor (even if it's run) won't be able to substitute the string "integer*4" for the string "UD_POINTER". Retry trial 2 after enabling the directive. Regards, Steve Emmerson Ticket Details =================== Ticket ID: FLZ-896534 Department: Support UDUNITS Priority: Normal Status: Closed