The STC CAETCL randomly stops working.
The Log shows
ETCL912E ETCL security monitoring disabled due to abend
AT8#GBL S0C4 at 00D494BC LMOD AT8#GBL CSECT AT8#GBL
OWNER = CA Cleanup for RACF R12.1
MODULE = AT8#GBL FMID = CDY1C10 RMID = RO93933
Release : 12.1
Component : Cleanup for RACF
The Abend is resolved with Ptf SO10777
Note an IPL IS required although the Ptf notes it is not required to install this Ptf.