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

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

Oracle Error Description

ORA-12593: TNS:no registered connection

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

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

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

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. If error persists, contact Oracle Customer Support.