How to fix the Oracle error TNS-12635: No authentication adapters available?

In this post, you’ll learn more about the Oracle ErrorTNS-12635: No authentication adapters available with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12635: No authentication adapters available

Reason for the Error TNS-12635: No authentication adapters available

Cause: The executable was not linked with any authentication service adapters but the sqlnet.ora parameter that determines whether or not authentication is required was set to true.

How to fix the Error TNS-12635: No authentication adapters available ?

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

Action: Either disable the parameter or relink the executable with service adapters.