Ran job BC1JJB03 without the UPDATE parm to see how things would look and it got a RC-08 in STEP0001.
Release: V18.0 V18.1
Component: CA ENDBAS SCM
The error is the result of 3 failed updates to ENHAEPGM -
To locate the library the member is in, page up and look for the page heading that starts with 'BATCH JCL TAILORING AID ...'
The page heading identifies the data set being processed.
ENHAEPGM is located in the CSIQOPTN library:
All the errors in ENHAEPGM were to comment lines so not a problem that the lines were not updated.
Either manually edit ENHAEPGM and update the comment lines or just ignore the errors.