Client had a problem with Endevor, which caused ENF to hang.
ENF was cancelled.
S ENF was performed, and immediately abended with
SYSTEM COMPLETION CODE=0C6 REASON CODE=00000006
In this case, a storage overlay for ENF module CAS9MSG.
Try S ENF,,,REINIT
Allows all CAIENF global modules to be refreshed at startup time.
If the above does not solve the s0c6 problem,
Call CA Support and be prepared to IPL.