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Windows: Local or Bequeath Connections As Sysdba Fail With TNS-12557 or TNS-12560 (Doc ID 397231.1)

Last updated on JANUARY 22, 2020

Applies to:

Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 8.1.7.0 to 11.2.0.4 [Release 8.1.7 to 11.2]
Oracle Net Services - Version 8.1.7.4 to 11.2.0.4 [Release 8.1.7 to 11.2]
Microsoft Windows x64 (64-bit)
Microsoft Windows (32-bit)

Symptoms

With a single installation of an older version Oracle database it was possible to use SQL*Plus with "connect / as sysdba" to make a local connection to the database. Since installing a higher version of product into a separate Oracle home, this method has started to fail with the following error: 

 

 

Changes

This problem can arise when another installation of Oracle products into a separate ORACLE_HOME would cause this problem as it has changed the environment.

Cause

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In this Document
Symptoms
Changes
Cause
Solution

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