How to fix the Oracle error NNO-00259: configuration tables have not been installed or are inaccessible?

In this post, you’ll learn more about the Oracle ErrorNNO-00259: configuration tables have not been installed or are inaccessible with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNO-00259: configuration tables have not been installed or are inaccessible

Reason for the Error NNO-00259: configuration tables have not been installed or are inaccessible

Cause: The configuration database has not been properly installed.

How to fix the Error NNO-00259: configuration tables have not been installed or are inaccessible ?

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

Action: Make sure the Oracle Network Manager and its database have been properly installed