>I think we've hit the proverbial brick wall. We'll just have to put it the UPP (Unresolved Problem Pile) for the time being.

Hogwash, Harry. You just have to break the problem into manageable parts. In other words, if this is a VFP bug, then you should be able to reduce it to a simple set of reproducible circumstances. Take the offending code, and put it in a base class form, and test. Just manipulate the error's environment, removing layers of complexity until you are looking at a single line of code in the command window. You can always solve this sort of problem with brute force and the scientific method.