IDC31550I UNABLE TO LOCATE ANY CACHING SUBSYSTEM DEVICES ONLINE

Explanation
The user issued either a LISTDATA or SETCACHE command,
but the system could not find any subsystem devices online for the
associated UNIT and VOLSER.

System action
Processing is ended for this command.

Programmer response
Do the following: Ensure that the correct UNIT and VOLSER are specified.
Make sure there are volumes online. You can use the DEVSERV PATHS
command to determine the volume and path status. 
Rerun the command.

Source
DFSMSdfp

Module
IDCLA01