John, MPLAB does not create the .hex file unless the compilation was successful. Why they issue the hex file not found message escapes me. Check your error log file from the compile & you should find your answer. -Dan At 03:07 PM 11/16/98 -0500, you wrote: >Hi: > > I've just installed MPLAB 3.99 and am using it with CCS PCM compiler. It >appears to call the compiler ok, but then I get an error: > >Compiling ATGPSE.C: >Command line: "C:\MPLAB\CCSC.EXE C:\PROGRA~1\MPLAB\ATGPSE.C" > >MPLAB is unable to find output file "ATGPSE.HEX". > >Build failed. > >Anybody know what I've got set up incorrectly here? > >Thanks, > >John Hansen > > 73, Dan Welch w6dfw@qsl.net