Connecting to APPC/MVS

Before an LU 6.2 conversation can be established with IMS, the following must be active: APPC/MVS, VTAM®, and NCP.

Recommendation: Start APPC/MVS and VTAM before starting IMS.

When you specify APPC=Y in the IMS procedure, IMS automatically starts communication between IMS and APPC/MVS. If you specify APPC=N in the IMS procedure, you can use the /START APPC command to establish communications.

You also need to use the /START APPC command in either of the following situations:

If APPC/MVS is stopped and restarted while IMS is running
If you terminate communication between IMS and APPC/MVS by using a /STOP APPC command