ID:181004 DQS I/O pin "<name>" assigned differential I/O standard <name> -- DQS I/O pin does not feed a nDQS I/O pin. A DQS I/O pin that does not feed a nDQS I/O pin cannot have a differential I/O standard assignment

CAUSE: You assigned the specified differential I/O standard to the specified DQS I/O pin. However, the DQS I/O pin does not feed a nDQS I/O pin. A DQS I/O pin that does not feed a nDQS I/O pin cannot have a differential I/O standard assignment.

ACTION: Change the I/O standard assignment on the specified DQS I/O pin to a single-ended I/O standard.