Why does a Datacom Server connection get a "TCP/IP CONV FAILURE: Socket operation on nonsocket." error?


Article ID: 48568


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Trying a TCP/IP connection from a Windows client, a user could receive a pop-up or an error message stating: "TCP/IP CONV FAILURE: Socket operation on nonsocket."


This message is returned when a TCP/IP connection cannot be established with the mainframe Server region as the port specified in the ODBC Data Source or in the connection string is, for any reason, not operational.

Here is a list of the most common conditions :

  • The Server Mainframe region is not active or has abended.
  • PROTOCOL=BOTH is not coded in the Server Mainframe region start up options.
  • Wrong Host Name and/or Port Number in the ODBC Data Source or in the connection string
  • FIREWALL settings prevent a successful connection to the mainframe port where the Datacom Mainframe Server STC is listening.


Component: IDEAL