How to fix the error ORA-00203: using the wrong control files?

In this post, you’ll learn more about the Oracle ErrorORA-00203: using the wrong control files with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-00203: using the wrong control files

Reason for the Error ORA-00203: using the wrong control files

The mount ID in the control file is not the same as the mount ID in the control file used by the first instance to mount this database. The control files are for the same database but they are not the same files. Most likely one instance is using a backup control file.

How to fix the Error ORA-00203: using the wrong control files ?

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

Check that the correct control files were specified.