>My application resigns on NOVEL server and all users had no problem running it, but after I recompiled and created new exe from VFP 5.0 project to VFP 6.0 I got an error "FATAL error Exception Code = C0000005" when closing an application on some users PC.
>Any ideas what's wrong...

Check out the UT knowledge base. Ed Rauh has an article on this, I think it is under "Frequently asked questions".