BuiltInFailures.CurtainGridFamilyFailures.NonSystemPanelFamiliesCannotBeUsed
Property
Description:
Non-system panel families cannot be used for non-rectangular panels. If your panel is simple, create an appropriate panel type derived from the system panel family.
Non-system panel families cannot be used for non-rectangular panels. If your panel is simple, create an appropriate panel type derived from the system panel family.