How to fix the Oracle error ORA-12629: TNS:no event test?

In this post, you’ll learn more about the Oracle ErrorORA-12629: TNS:no event test with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12629: TNS:no event test

Reason for the Error ORA-12629: TNS:no event test

An attempt to register a connection for event notification failed because the ability to test for events is not available.

How to fix the Error ORA-12629: TNS:no event test ?

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

Not normally visible to the user. For further details, turn on tracing and reexecute the operation and contact Oracle Customer Support.