COF501I DLF START IS REJECTED. DLF MUST BE A STARTED TASK.

Explanation
 The system rejected the request to start the data
lookaside facility (DLF). DLF must be a started task. Do not start
DLF through JCL or as a Time Sharing Option Extensions (TSO/E) command.

System action
 The system does not start DLF.  If you attempted to start DLF in a background job step, the system
issues this message to the job log.
If you attempted to start DLF from that terminal, the system issues
this message to a TSO/E terminal.

System programmer response
 Ask the system operator to enter
the command to start DLF.

Module
 COFMISDO

Source
 Data lookaside facility (DLF)

Routing Code
 2,10

Descriptor Code
 11