Oracle® Database 11g / 12c / 18c error codes ORA-00209: control file blocksize mismatch, check alert log for more info

ORA-00209: control file blocksize mismatch, check alert log for more info

Oracle Error Code: ORA-00209

Cause: The block size in the control file header does not match the size specified in the DB_BLOCK_SIZE parameter.

Action: Look at the alert log for more information.