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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.