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2492284 - TNS-01189 - The listener could not authenticate user


During the upgrade of Oracle from version 11g to 12c ( , a TNS error occurs and the process cannot be continued.

The error is the following: 

TNS-01189: The listener could not authenticate the user

Another possible symptom to the issue is the error 'Listener "LISTENER" already exists.'



  • SAP Products based on NetWeaver
  • Oracle Database


LISTENER, ADMIN_RESTRICTIONS_LISTENER, TNS, LSNRCTL, 1104, 121, 11.2, 1189, 01189, TNS-1189, authentication , KBA , BC-DB-ORA , Oracle , Problem

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