Re producing the issue:In OBIEE.
go to Mange Sessions:
click on Manage sessions Then click on view log.
You got the error message:
Make sure logging is turned on for the user. i.e >2 or more.
Now bounce the OBIEE services and you should be able to view the logs now.
If you still have the issue then verify the session variable " Log Level" is not set with any default value like "0"
If yes then
Remove this default value and try again by bouncing the OBIEE services.
3) If you still have issues make sure there are not custom initialization blocks defined to block the logging.
see example below:
Remove this and bounce the OBIEE. You should be all set ..