To define RRS as a subsystem, place the following statement in the IEFSSNxx parmlib member:

SUBSYS SUBNAME(RRS)

Place this statement after the statement that defines the primary subsystem. You can replace RRS with a subsystem name of your choice, but do not supply any other parameters. In particular, do not supply an initialization routine. For more information about IEFSSNxx, see z/OS MVS Initialization and Tuning Reference.

Or, issue the SETSSI ADD,SUBNAME=RRS console command after IPL to dynamically define the RRS subsystem to the SSI. You can replace RRS with a subsystem name of your choice but do not supply any other parameters. In particular, do not supply an initialization routine. For more information about the SETSSI command, see z/OS MVS System Commands.