>>>>Interestingly if I include CLEAR PROGRAM in my Main.prg on the way out while shutting the app down, it works ok, just as if I issued it from the Command Window. Ok, a workaround ... but I want to know what and why in case it comes back in a more malevolent form or time. :-)
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>Update: there's a new vfp6 SP3 "caching" bug reported in the 1/00 FPA that sounds like it might be related to your problem. It's in Malcolm Rubel's article on Run-time Compilation in the "Now the Bug" section - I thought of your problem when I read it - check it out, if you can.

Thanks Bruce. Just got my copy yesterday so I'll check it out. Since inserting the CLEAR PROGRAM statement "fixed" it, I've been busy with other things and haven't had much of a chance to look the problem yet. Just something about CLEAR PROGRAM in a run-time scenario that makes me feel uncomfortable for some reason. :-)