hi,
I am really astonished to see at server when i connect by writing username/password it says tns-protocol adapter error but it takes username/password@servicename it connects ,this problem is occasional.I think when I give service name it connects thru Net8.how does connection take place without service name.Is this something to do with multithreaded server.

thanks for all informations,as i am not finding this bit of info any where in documentations.
bye