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How to Troubleshoot ORA -12638 / ORA -12631 with Database User Authentication? (Doc ID 2724945.1)

Last updated on APRIL 17, 2023

Applies to:

Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database - Enterprise Edition - Version and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.


This document is meant to list some known causes and solutions for the errors ORA-12638, ORA-12631 encountered with OS User authentication to Database and the troubleshooting steps one can use to identify the cause of the problem. 

NOTE: In the images and/or the document content below, the user information and data used represents fictitious data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.


Troubleshooting Steps

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In this Document
Troubleshooting Steps
 Typical Problems:
 ORA-12638: Credential retrieval failed
 ORA-12631: Username retrieval failed

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