I have a business object (CustomerBO) that I’ve configured to raise a single property changed event for all properties. I’ve placed this BO on a SF maintenance form. The maintenance form also includes a ChildFormDialog that maps CustomerBO to the dialog form. If I add the FieldPropertyChanged event handler to the maintenance form code, I get an invalid operation exception (see attached) when I attempt to show the ChildFormDialog. If the FieldPropertyChanged event handler is not present on the maintenance form, the ChildFormDialog executes okay.  The FieldPropertyChanged event handler doesn’t have to contain any code to cause the error.

-Larry