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Thursday, 22 March 2012

ORA-12640: Authentication adapter initialization failed

Sometimes when starting the database with the system user you will face this issue the above error message written in ORADIM.LOG

  1. Modify SQLNET.ORA
  2. Start database with SQLplus after the service is restarted.
  3. Start the service as specific users.
Modify SQLNET.ORA, either by removing the line
or by changing it to

Start the database manually after the Oracle database service has started, using
SQL*Plus and connecting as SYSDBA.

Start Service as a Specific User
Choose Start > Settings > Control Panel > Services.
Or Type in RUN “services.msc” to open the services dialog box.
Select the service and right click on this
Select Logon select this account
Specify the username and corresponding password.


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