Is it possible that you have a copy of the old class library somewhere on the path on that PC?

>Sergey,
>
>>>You can use
>>>COMPILE CLASSLIB myclasslib
>>>to recompile all the code in your class library.
>
>Yeah, I've had that done by having the project rebuilt... the problem seems to be on one machine. When the classes were moved over to another pc that didnt' have the new class libs, the problem didnt occur.
>
>If this sounds confusing, there's something I've done since the first post. In utter frustration, I removed all the intermediate subclass references and made the relevent classes subclasses of the native VFP classes... the error kept coming on the first machine. Its got to be something with the "new" subclasses of the native VFP class libs.
>
>Regards,
>Thom C.