ID:181001 DQS I/O pin "<name>" feeds <number> DQ I/O pins -- the maximum allowed fanout of <number> DQ I/O pins has been exceeded

CAUSE: The Fitter could not place the specified DQS I/O pin because the maximum allowed fanout has been exceeded.

ACTION: Modify the design so that the specified DQS I/O pin does not feed more than the specified amount of DQ I/O pins.