An NAK record is received as a response to the TCP/IP Signon record OPEN/OPEN SSL.
The NETSERV socket connection is terminated after this message.
Notify the system programmer.
See Network Job Entry (NJE) Formats and Protocols for the description of NAK reason codes and the possible reasons.
NETSERV socket initialization - TCP/IP signon
IAZNJSTK
8, 43
4