Watch out for open APAR PI18475. This describes a situation where IRLM V2.3 fails with ABEND0C4 in DXRRL770 after PI07853/UI14551 is applied.
The error occurs during P-lock processing. The full range of symptoms is unknown, but include DB2 termination with reason code 00C90093, indicating an invalid request to update an object allocated to a utility, preceded by message DSNT501I with reason code 00C202AA.
However, be aware of the warning implied in the APAR text indicating that "other symptoms may be possible". It is strongly recommended that you monitor this APAR and apply the corrective maintenance when available.