TSM can use Inter-User Communication Vehicle (IUCV) to communicate with the TSO administrative client. However, it is recommended that either TCP/IP or APPC be used for TSO administrative client communications.
OS/390 Release 5 and higher do not support IUCV. Ensure that IUCV is available on your system before trying to use it as a communication method for the TSO administrative client.
Enter the following in the server options file:
+--------------------------------------------------------------------------------+ |iucv start | +--------------------------------------------------------------------------------+