How to fix the Oracle error NNO-00263: error from configuration database?

In this post, you’ll learn more about the Oracle ErrorNNO-00263: error from configuration database with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNO-00263: error from configuration database

Reason for the Error NNO-00263: error from configuration database

Cause: the server encountered an error while accessing the configuration database. The error can occur when the database is unavailable, or SQL*Net connectivity to the database is interrupted.

How to fix the Error NNO-00263: error from configuration database ?

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

Action: Make sure that the database is running, that its name and password as specified in the Oracle Network Manager are accurate, and that there is SQL*Net connectivity between the Oracle Names server and the database. To force the server to start up anyway, using its checkpoint data, start the server with the names.no_region_database parameter set to TRUE. If no checkpoint data is available, the server will shut down.