When opening a design with LOC'd GT11 Pins, Floorplan Editor gives many bogus DRC errors like:
"ERROR:FloorplanEditorC - MGT113AB_TXN<0> : Location constraint incompatible. Please check user IO direction and IOB type.
ERROR:FloorplanEditorC - MGT113AB_TXN<0>: The bank number specified does not exist"
Gigabit Serial location does not have any bank number associated with it. Why does it error out?
This is a known issue in Floorplan Editor. It is fixed in the next generation floorplanning tool.