>I am baffled. I do have a VFP7 app that is installed on a machine that has no developer version of VFP, no source code, just the APP and the VFP 7 runtime. This app has PRG based classes that use the DEFINE CLASS ... OF ClassName with absolutely no extensions. The app works. Now, I also have no VCX classes with a name the same as any of the PRG classes. There are no error messages in my ErrorLog table either. This is a Word automation app, and those classes are used to create the Word docs. This technique is working great. I do not know what else to say.

Could be that the prg containing the class definition is cached in memory by something else being loaded from it in another place in your app...