There are times when it is necessary to run the Endevor options trace (EN$TROPT) in foreground to confirm the value of tables. This can either be ISPF Endevor or QuickEdit.
CA Endevor Software Change Manager 18.0
CA Endevor Software Change Manager 18.1
You can confirm the allocation by issuing the 'TSO ISRDDN' command. You should see the DDNAMES BSTERR and EN$TROPT allocated to that file.