ORA-12638: Credential Retrieval Failed Error Message

When trying to connect to the Oracle database you may receive the following error message:

The authentication service failed to retrieve the credentials of the user.

In order to solve this issue we advise to do the following steps:

1. Try to lock and unlock the PC, where such error appeared. If it does not solve the issue proceed with the next step.

2. Restart the Windows Service for Oracle. If it does not solve the issue proceed with the next step.

3. Go to the $ORACLE_HOME/network/admin directory and open the sqlnet.ora file. Search for SQLNET.AUTHENTICATION_SERVICES= and set it to SQLNET.AUTHENTICATION_SERVICES=(NONE). Save the file and the issue should be solved.


If you have some additional questions, feel free to mail us: support@ispirer.com



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