ID:15885 Output port "<name>" of DDIO_OUT WYSIWYG "<name>" has too many fan-outs.

CAUSE: The specified DDIO_OUT primitive has too many fan-outs. If DDIO_OUT is not using the LVDS signal splitter, it can only have a single fanout. DDIO_OUT can have two fan-outs in the LVDS signal-splitter case and the two fan-outs must have different polarities in that case.

ACTION: Check the design and make sure the specified DDIO_OUT fan-outs are legal.