Dan, In Prolog, a variable is denoted by starting it with a capital letter. Thus Interpreter is a variable, and so >[eclipse]: [Interpreter]. gives you an instantiation fault. If you have a file named Interpreter, you should enclose it in quotes (either double or single), e.g. ["Interpreter"] This should compile your program correctly. Cheers, KishReceived on Tue Apr 15 14:20:32 2003
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