ID:176133 Can't place differential I/O <name> pin <name> in location <name> -- differential I/O pin requires dedicated I/O SERDES, but location does not have differential I/O <name> SERDES available

CAUSE: The Fitter tried to place the specified differential I/O pin in the specified location. However, the specified differential I/O pin requires a dedicated I/O SERDES. The Fitter cannot place the differential I/O pin in the specified location because the location does not have the specified differential I/O SERDES available.

ACTION: Delete the differential I/O pin location assignment, or change the location assignment to a location that has the specified differential I/O SERDES available.