Oracle reports should not require another login...
When we run a report by launching it from a form... it works.... we don't see a login screen because we use a jar file that does the login for us.
The problem is, when we go away for an hour, and come back... our forms session is still active and working - but when we run the report again - we get the login screen.
Too often, this login fails to run the report properly because it does not set the correct ROLE to run the report when NOT using the jar file to log in to reports server.