ID:176338 Node "<name>" is used as the input clock of DDIO output registers but does not use global clock -- timing may not be met

CAUSE: The specified node is used as the input clock of DDIO registers but does not use a global clock. This can be caused by an explicit GLOBAL_SIGNAL assignment of OFF or there may be too many other signals using global clocks.

ACTION: Assign the node to use a global clock.