IAZ0518I 
server_name device_name Error sending data on the socket, TCP/IP rc: rc rsn: rsn
Explanation
An attempt to send data on a socket failed.
This message is preceded by message IAZ0545I, which provides additional diagnostic information.
In the message text:
- server_name
- The NJETCP server name.
- device_name
- The device name associated with the socket, or socket name if the device name does not exist.
- rc
- The errno value from the TCP/IP send() service.
- rsn
- The reason code, if available, that is associated with the error.
System action
The NETSERV socket connection is terminated.
Operator response
Notify the system programmer.
System programmer response
See z/OS Communications Server: IP Sockets Application Programming Interface Guide and Reference for the description of the send() service and the possible return codes.
Source
NETSERV socket processing
Module
IAZNJSTK
Routing code
8, 43
Descriptor code
4