Activating message formatting

The next MVS subsystem to invoke the subsystem console message broadcasting service of MVS console support activates message-handling. Before activating message-handling, you must define CICS® as an MVS subsystem with support for console message-handling, and also specify the message-formatting parameters in the DFHSSIyy member of the SYS1.PARMLIB library.

Message-handling is activated when you start a supported CICS region or if an automated-operation program, such as NetView, is active in the MVS image. See The console message-handling facility for more information on console message-handling.

A newly started CICS region determines its own applid during initialization. Until the applid is known, message-formatting cannot operate. Therefore, messages issued very early in CICS initialization are not formatted.