| ERROR | osnmpx: send/receive error exchanging Mach ports. |
| CAUSE | The Mach driver failed to exchange port information with the other side of the connection. Either msg_send (sercose[0] == 1) or msg_receive (sercose[0] == 2) failed. |
| ACTION | Check return code in sercerrno. Make sure both sides of the connection are still running. |