CMMVC6596E The command has failed because you have specified an I/O group that does not exist.
Explanation
You must specify an existing I/O group when you submit this command.
User response
Specify an existing I/O group, and resubmit the command.
You must specify an existing I/O group when you submit this command.
Specify an existing I/O group, and resubmit the command.