Oracle® Database 11g / 12c / 18c error codes ORA-00203: using the wrong control files

ORA-00203: using the wrong control files

Oracle Error Code: ORA-00203

Cause: 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.

Action: Check that the correct control files were specified.