ID:17046 Illegal connection found on I/O output buffer primitive <name> to <name>. The IO output buffer should only drive out to a top-level pin.

CAUSE: The specified I/O output buffer primitive is illegally configured. The I/O output buffer either has multiple fanouts or is not driving a top-level pin.

ACTION: Correct the specified I/O output buffer primitive and make sure it does not have any other fanout than a top-level pin.