Thursday, 22 May 2014

ORA-12638: credential retrieval failed

Got this error while connecting to Oracle Database

This looks like entered wrong password, but actually its not.

Problem will be the Oracle server is not configured to support Windows authentication
or The credentials used to login are not sufficient to allow to login to the server.

Workaround
Goto %Oracle Home%\NETWORK\ADMIN in my case it is 
C:\app\prathap\product\11.2.0\dbhome_1\NETWORK\ADMIN

Open sqlnet.ora file and modify 
SQLNET.AUTHENTICATION_SERVICES= (NTS) to
SQLNET.AUTHENTICATION_SERVICES= (NONE)


It worked for me.

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