>My application framework is very similar to Tastrade sample found in the VFP sample directory. As I mentioned before the problem appears inconsistently. I at this moment don't not have problem running it. However last night It gave me the problem. And I have not changed any code since then.
>Is there a directory from Micrsoft that document all the problems reported. Or is there any service pack for vfp 5. Thanks for your time.

It seems to me that I gave your some ideas about possible source of your problem, Also, I see that Nancy gives you good advices too. It might be helpful to try it. Surely, you understand, that it's very difficult to assess your framework approach on-line.