How to fix the Oracle error TNS-12593: TNS:no registered connection?

In this post, you’ll learn more about the Oracle ErrorTNS-12593: TNS:no registered connection with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

TNS-12593: TNS:no registered connection

Reason for the Error TNS-12593: TNS:no registered connection

Cause: An attempt to solicit network event activity has failed because no connections are registered for event notification.

How to fix the Error TNS-12593: TNS:no registered connection ?

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

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