ARC0102I
SETSYS WITH {JES2 | JES3} REJECTED, SUBSYSTEM ALREADY ESTABLISHED, RC=retcode

Explanation

During DFSMShsm initialization, the JES2 or JES3 parameter was specified on a SETSYS command after DFSMShsm had already established the job entry system by default or prior system command.
Retcode
Meaning
4
For this host, DFSMShsm had already established a job-entry subsystem by default or by a specific command.
8
One or more already-started DFSMShsm hosts had the other job-entry subsystem specified or established.

System action

The JES2 or JES3 parameter on the SETSYS command is rejected. DFSMShsm processing continues.

Operator response

Notify the storage administrator.

Programmer response

Retcode
Action
4
Specify JES2 or JES3 in the SETSYS command before all pool-configuring ADDVOL or DEFINE commands in the ARCCMDxx member.
8
Decide which job-entry subsystem properly describes the environment for all the DFSMShsm hosts in this z/OS MVS™ image. You might need to update the ARCCMDxx PARMLIB members used for this host or the other hosts, or both, before restarting one or more hosts.

Source

DFSMShsm