The close() service failed.
The NETSERV socket connection is terminated after this message is issued. This message does not influence the termination of the connection.
Notify the system programmer.
See z/OS Communications Server: IP Sockets Application Programming Interface Guide and Reference for the description of the close() service and the possible return codes.
NETSERV socket close
IAZNJSTK, IAZNJTCP
8, 43
4