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NID-00121: Database should not be open


Sometimes You can get “NID-00121: Database should not be open ” error.


Details of error are as follows.

NID-00121: Database should not be open

Cause: The database was open. To change the DBID, the database must be mounted exclusively.
Action: Shutdown the database and mount it in exclusive mode.



This error is related with the database OPEN state. Shutdown Instance and startup mount mode.

shutdown immediate;

startup mount;


and Run nid tool again using the following post.

Oracle Database Name Change Using NID



Do you want to learn Oracle Database for Beginners, then read the following articles.

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