C03 abend on compile after upgrading to z/OS 2.3 RSU1812

Document ID : KB000125536
Last Modified Date : 30/01/2019
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Issue:
After upgrading to Z/OS 2.03 RSU1812 we cannot compile and link a module using SUBSYS=LAM
To get around the abend we were able to copy the member out of  the Librarian master file  to a temp file and  use that as input to the
 job instead of using SUBSYS=LAM.
Environment:
Librarian V4.4 
z/OS 2.3 RSU1812
Cause:
After applying IBM maintenance RSU1812 for z/OS 2.3 APAR OA53955 (Z/OS 2.3) introduced new  DEBCHK ADDLOCK/UNLOCK function which causes jobs using SUBSYS=LAM to fail with DEBCHK errors or SC03 abends on compiles.
Resolution:
Download and apply Librarian PTF SO04128.
Follow the instructions in the HOLDDATA.
-   Reinit LAM subsystem using CA Common Services rimparms as follows:
   PRODUCT(CA-LIB44) VERSION(LJ44) INIT(LJ44INIT) PARM(REINIT,NAME=LAM)