ID:15673 Port <name> of Clock Delay Control Block "<name>" must be driven by an I/O, but is currently driven by non-I/O <name>

CAUSE: The specified port of the specified Clock Delay Control Block must be driven by an I/O, but is currently driven by the specified atom. This is not allowed.

ACTION: Modify the design to drive the specified port of the Clock Delay Control Block from an I/O.