Changing the EUID, using SuperUser authority, is designed to be a temporary exercise.
From IBM documentation on switching in and out of superuser authority:
. This activity should not be done in a multiprocess address space (which is what OPSMAIN is).
. Also, there is a 'rotation' of UID values when switching between the UID, the effective UID (EUID), and the real UID.
. This is why the UserID of the ASID in which this occurs does not change upon the first switch of a UID.
. If superuser authority is needed in a piece of automation, the switch/change should be done in an OSF/USS server ASID (to isolate OPSMAIN).
. If switching/changing the UID/EUID, the change should be reverted to what the values were before the change was needed, in the same piece of executing code.
Reference doc URL: https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.2.0/com.ibm.zos.v2r2.bpxb200/swit.htm
The client will find all occurrences of this changing/switching of the UID in their automation, and ensure that the UID is changed back to the necessary value and/or move the automation, so that the code is not executing in the OPSMAIN ASID.