ORA-38740: Usable blocks value [string] is not valid.

Cause: A flashback database log file header contained a usable blocks value greater than the file size. The flashback database log file file is corrupt.

Action: If you are doing a FLASHBACK DATABASE, then the flashback cannot be performed because of the corrupted log. A restore and an incomplete recovery must be performed instead.

Error Type: ORA

• Additional information for ORA-38740: Usable blocks value [string] is not valid.38740
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