Oracle® Database 11g / 12c / 18c error codes ORA-12204: TNS:received data refused from an application

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

Oracle Error Code: ORA-12204

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

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