ID:21153 Port <name> of atom <name> is connected, but this connection is not allowed because physical coding sublayer (PCS) no longer supports generic FIFO mode

CAUSE: The specified RMFIFOALMOSTFULL or RMFIFOALMOSTEMPTY port pf the specified atom is connected, but this connection is not allowed because PCS no longer supports generic FIFO mode.

ACTION: Check the design and make sure that the RMFIFOALMOSTFULL or RMFIFOALMOSTEMPTY port is not connected.