ORA-19612: datafile string not restored due

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ORA-19612: datafile string notrestored due to string
Cause: Theindicated file could not be restored, because all of its data blocks were
not found in the backup piece.
Action: Therestore conversation remains active, and the current piece must be
re-processed. If the failure cannot be resolved by re-processing the currentpiece,
then the restore conversation must be cancelled.