The server failed in attempting to listen for session requests on the server's internal tape server.
Server operation continues, but NDMP operations may fail.
Ensure that the NDMPCONTROLPORT option defaults to or is set to a port number which is available in the system. The QUERY OPTION command can be used to determine the port number associated with the NDMPCONTROLPORT option. If this value requires change, the server will have to be restarted after setting the option in the server options file.