See at the problem Q253879 in MS KB.

Martin

>Hi guys:
>
>I am having a problem with consistency. I am using vfp 7 and have created two projects: one customerinterface and the other datamanager.
>
>I have two classes both of which are defined as session olepublc customer and datamanager.
>
>The problem is that sometimes after changes and rebuild, I get the error message "class definition not found."
>
>and it worked a few minutes ago... then I fool around with it, delete it and rebuild it and then it works for a while, then can't find it again....
>
>What's going on ?? any ideas??