Running CA Endevor under CA ROSCOE BTSO,which uses an 7 character USERID from the AXCB, will cause invalid security violations when using CA Endevor 18.0 and z/OS 2.3 attempts to work with temporary datasets.
BTSO applications may fail to use proper userid in all cases.
CA Roscoe Interactive Environment 6.0
z/OS 2.3
The PTF RO45718 do not work properly when used under z/OS 2.3
Apply PTF LU00537
CA ENDEVOR 18.0 Notes
The Interface to CA Roscoe are discontinued beginning with V18 incremental release 0 (also known as the base release)
https://techdocs.broadcom.com/us/en/ca-mainframe-software/devops/ca-endevor-software-change-manager/18-0/release-notes-ce18/cumulative-list-of-v18-0-enhancements.html