How to fix the Oracle error NNO-00250: invalid administrative region description?

In this post, you’ll learn more about the Oracle ErrorNNO-00250: invalid administrative region description with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNO-00250: invalid administrative region description

Reason for the Error NNO-00250: invalid administrative region description

Cause: The server encountered an invalid administrative region description during startup. This error will prevent the server from starting. The administrative region description is stored in the server’s names.ora configuration file.

How to fix the Error NNO-00250: invalid administrative region description ?

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

Action: Make sure that the names.admin_region parameter in names.ora is correct. The names.ora file is automatically generated by the Oracle Network Manager, but administrators can edit the file at any time, introducing errors. If the file was never changed, contact Worldwide Customer Support.