How to fix the Oracle error TNS-12204: TNS:received data refused from an application?

In this post, you’ll learn more about the Oracle ErrorTNS-12204: TNS:received data refused from an application with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12204: TNS:received data refused from an application

Reason for the Error TNS-12204: TNS:received data refused from an application

Cause: The application using Connection Manager refused the connection at the listener.

How to fix the Error TNS-12204: TNS:received data refused from an application ?

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

Action: Make sure that the application listener at the destination is functioning correctly. If it is and the problem persists, contact Worldwide Customer Support.