I have been trying to find the problem for 2 days and think it's time to ask someone else... My "TEST" database was set up, configured and I was able to log into the OEM. Now I can't do that... I am getting "Invalid Option for Alter Session" when I type in any login that I normally used before. I have de-installed OEM and components, and tried to reconfigure and still no luck. I have looked at the sqlnet, tnsnames, listener, and init files thinking I would find a problem... It looks ok to me. I have one instance named orcl... I have gone into the svrmgr and done the connect Internal... and granted sysdba and sysoper to system... still can't log in or start the service.