ID:15886 Output port "<name>" of DDIO_OE WYSIWYG "<name>" has too many fanouts.

CAUSE: The specified DDIO_OE primitive has too many fan-outs. DDIO_OE primitive can only drive a single fan-out to an I/O output buffer.

ACTION: Check the design and make sure there is a specified DDIO_OE only fan-out to a single I/O output buffer.