D IPLINFO
One question that is unasked so far -- why was the JCK failure not discovered when testing the z/OS upgrade? There was a failure in the process if JCK wasn't tested, or if it was tested and worked then why did the upgrade subsequently break it? In other words, your site has a serious process flaw in your z/OS upgrade procedure that needs fixing before the next upgrade is done! Especially since z/OS 2.2 was announced this week for September delivery!