After applying z/OS 2.1 toleration maintenance to z/OS 1.13, the user executed utility stckfindr against CEEPLPKA for the new offset. The user executed two runs using the new offset 01E5BB4 and received different results. I have the output for review and can send via email.
Release: TCDASM00200-2-Date Simulator
Copy CEEPLPKA from the original library (CEE.SCEERUN) to some user load library, this library must be PDS, not PDSE.
Use STCKFNDX, SET and warp for it, otherwise it is possible that our fetch program will not get control.