ID:176140 Differential I/O <name> pin <name> is assigned to a <name> location <name>. However, you must assign the specified differential I/O pin to a differential <name> location

CAUSE: You assigned the specified differential I/O pin to the specified location in your device. However, the Fitter cannot place the pin at the location because the direction of the pin does not match that of the location.

ACTION: You must assign the pin to the specified differential location. Remove or change the pin assignment.