ServerName cannot be used with HostName, PortNumber, SID, or ServiceName.
CAUSE:This error message occurs when a user has information entered in "Standard Connection" and "TNSNames Connection".
ACTION:When creating an Oracle DSN, the user must only enter information for either Standard Connection or TNSNames Connection, but not both. If the user sees the error message when testing the connection from the Standard Connection screen, ensure that no information is entered in the TNSNames Connection screen. Similarly, if the user sees the message when testing the connection from the TNSNames Connection screen, ensure that no information is entered in the Standard Connection screen.
KB421981
