We had no issues with IDMS when upgrading to z/os 2.4.
Michigan State University.
I have survived MANY os upgrades – I cannot remember a time when we HAD to modify IDMS because of an OS upgrade – as far as the ALLOWUSERKEYCSA we had the os team keep the option they had to allow us to adjust AT OUR SCHEDULE
But the BEST solution (in my opinion) is to:
Run a RECEIVE HOLDDATA
Run a fixcat:
And note any non-applied fixes related to the z/os release you are moving to ...
Lead Sys DBA
IBM Global Technical Services on assignmemt to Humana Inc.
T 502.476.2538 or 502.407.7266