ID:15162 dataout port of GXB transmitter channel atom "<name>" must fan out to only one output pin

CAUSE: The dataout port of the specified gigabit transceiver block (GXB) transmitter channel atom either does not have any fan-out, has more than one fan-out, or fans out to some logic other than an output pin. The dataout port of the GXB transmitter channel atom must fan out to only one output pin.

ACTION: Modify the design so that the dataout port of the GXB transmitter channel atom fans out to only one output pin.