Re: ORA-12638 error

[Jared . Still]

You probably have a line in you sqlnet.ora file that looks like this:

sqlnet.authentication_services = (NTS)

If so, comment it out with a pound # sign.

Jared



                                                                                       
                             
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hai...DBA,

i'm a newcomer for Oracle Enterprise Edition.
i used to learn Personal Edition 8.1.6 before.

now i'm facing a problem in Enterprise Edition 8.1.6 on Win2000 Advance
Server.
It worked fine before then suddenly, when i attempt to login,
no matter it's SQLPlus, EMS, DBA Studio,....
it's just returned this error message:
    ORA-12638 Credential retrieval failed
so i can't login and can't start the oracle.

i referred to Oracle error code description,
it say,
    Cause: The authentication service failed to retrieve
            credentials of a user.
    Action: Enable tracing to determine the exact error.

so, what should i do? enable tracing for what? Listener?


thanks and hav a nice day.



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