>>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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>Okay, even more drastic :) Have you tried commenting out all that code, every reference to the menu, and creating a fresh *extremely* simple TL menu that does nothing at all, make sure that runs fine.
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>Then, add your regular menu components, oApp code, SYSMENU code, etc, just one piece at a time, to diagnose exactly when the error first appears?
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>I know it's a PITA, but at this point, that might be the only sure way to pinpoint it.

Yeah, you're right, I don't like it. :-) It will take some time and I have some other things on my plate now, so when I get soem time, I'll try this and let you know.