I have found a special case that is guaranteed to cause a VFP Invalid Page Fault and, therefore, should be avoided:

- NEWOBJECT(CLassName, CLassLibrary) is used to instantiate an object and ;

- SET CLASSLIB TO is issued before the instantiation of the object is complete and ;

- SET CLASSLIB TO ClassLibrary (same class library) is issued after the instantiation of the object is complete and ;

- The object is released and ;

- NEWOBJECT(CLassName, CLassLibrary) is used to instantiate the object again, THEN ;

blamo - VFP Invalid Page Fault every time.