ID:167081 I/O standard "<name>" on I/O pin "<name>" is incompatible with the GXB channel's VCCH voltage setting "<name>"

CAUSE: You assigned a non-differential I/O standard to the specified transmitter or receiver pin(s). However, the specified pin(s) can use only a differential I/O standard. The Fitter will automatically assign the specified differential I/O standard to the transmitter or receiver pin(s).

ACTION: Remove the I/O standard on the specified pin or set a differential I/O standard to the pin..