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ORA-12638: credential retrieval failed tips

Oracle Error Tips by Stephanie F.


The Oracle docs note this on the ora-12638 error:

ORA-12638: Credential retrieval failed
Cause: The authentication service failed to retrieve the credentials of a user.
Action: Enable tracing to determine the exact error.

On the Oracle Technology Network Forums, a user is able to successfully resolve ORA-12638 after some help from repliers.  The original question was referring to a problem installing Oracle Designer, in which the user was thrown ORA-12638, when testing the connection, before the installation had even finished.

A replier pointed out to the user that ORA-12638 is "an Oracle database error, indicating that the Designer client was not able to connect to the database."

Though sometimes ORA-12638 can be resolved by restarting the database services in cases where Oracle on Windows is being used, although for this user it was not helpful.

However, the following direction was given, and once administered, was a successful resolution to ORA-12638:

Please check the sqlnet.ora file. Change the following entry and try, this will work.


Modified Entry -





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