Defining the XCF group name

OTMA communications require XCF. Both IMS and the OTMA clients must join the same the XCF group.

You specify the XCF group name for OTMA communications on the GRNAME parameter in either the DFSPBxxx PROCLIB member or the IMS control region JCL. If a valid XCF group name is not specified, OTMA cannot be started.

When the GRNAME parameter is specified, IMS joins the XCF group only when OTMA is started. If you have configured OTMA to start when IMS starts, IMS joins the XCF group during startup. If OTMA is not configured to start when IMS starts, IMS joins the XCF group only after OTMA is started by the /START OTMA command.

If you specify GRNAME= and OTMA is started, you can use the /DISPLAY OTMA command to display the XCF status. You are not required to define any XCF information.

If you use RACF® for security, the IMSXCF.group.member (client member name) must be defined in the RACF FACILITY class.