ID:21014 The datain[1] input of output phase alignment primitive "<name>" must be unconnected or connected to GND if the OPERATION_MODE parameter is not set to DDIO_OUT

CAUSE: The datain[1] input of the specified output phase alignment primitive is driven by an illegal source.

ACTION: Check the design and make sure that the specified datain[1] input is unconnected or connected to GND.