How to fix the Oracle error TNS-02502: Authentication: unable to find initialization function?

In this post, you’ll learn more about the Oracle ErrorTNS-02502: Authentication: unable to find initialization function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-02502: Authentication: unable to find initialization function

Reason for the Error TNS-02502: Authentication: unable to find initialization function

Cause: The native authentication service was unable to call the initialization function for the specified service because it does not exist.

How to fix the Error TNS-02502: Authentication: unable to find initialization function ?

You can fix this error in Oracle by following the below steps

Action: If this service adaptor came directly from Oracle, contact Oracle Customer Support, as this error should never happen. Otherwise, add an initialization function for the service being used.