>There is your answer. The .PRG file is the source and the .FXP file is the compiled (object) code. .PRGs can't be compiled at runtime; they require the development environment.

If this is true, why does it work on Windows 95? When I move the files to the NT server, I get the error. I am using the same machine when I run the program on Windows 95 and the server. Here is something which I found to be weird. In my EXE I put the following lines:

=MESSAGEBOX(IIF(FILE("test.prg"), "True", "False"))
DO Test.prg

The messagebox display True, but the next line give an error: "unable to find test.prg".