Monsignor Ames,

>lAllowMultipleInstances is .F. There is no visible instance of the form. As I said, this happening throughout our project since the upgrade, and goes away when we revert back.

OK, there's not a visible instance, but when the Framework runs the logic to check if there is an existing instance (visible or invisible), what is it finding? How is this message getting triggered?

To determine this, set a breakpoint in the Init() of CBaseForm at the point where it does the check.