How to fix the Oracle error ORA-12626: TNS:bad event type?

In this post, you’ll learn more about the Oracle ErrorORA-12626: TNS:bad event type with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12626: TNS:bad event type

Reason for the Error ORA-12626: TNS:bad event type

An attempt to register a connection for event notification failed because the event type is unknown.

How to fix the Error ORA-12626: TNS:bad event type ?

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.