I run DOS Foxpro 2.5 on a Win98SE network with several AMD powered computers with CPU speeds from 400 to 2.0 Gig. I've been having sporadic problems with a 1.6 computer giving me "function not implemented" errors which immediately crash my program. The function in question appears to sometimes be the Foxpro DATE() command, and sometimes a UDF I've created that performs Julian date conversions, but the odd thing is that I don't usually "catch" the error in my error trapping subroutine, it's a gray box message from either Windows or Foxpro. All computers are running the same programs, but only one computer has this issue. Any ideas?