How to fix the Oracle error NNO-00257: warning: cannot get serial number from region store?

In this post, you’ll learn more about the Oracle ErrorNNO-00257: warning: cannot get serial number from region store with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NNO-00257: warning: cannot get serial number from region store

Reason for the Error NNO-00257: warning: cannot get serial number from region store

Cause: The server encountered an error while trying to get the configuration database’s serial number. The error occurs almost always because time the server is unable to access the configuration database. If the error occurs during server startup, the server will shut down. If the error occurs during server operation (the server checks the serial number periodically to see if it should reload itself), then the server assumes a transient failure has occurred and repeats the operation a short while later. If the repetitions continue to fail for three days, the server will log another error and stop issuing the serial number load operation.

How to fix the Error NNO-00257: warning: cannot get serial number from region store ?

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

Action: First make sure that the Netadmin program has exported a server configuration for this name server. Next, 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. If the error occurs during server startup, you can force startup anyway, with checkpoint data, by starting the server with the names.no_region_database parameter set to TRUE. If no checkpoint data is available, the server will shut down.