ORA-19597: file string block size string does

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ORA-19597: file string blocksize string doesnot match set block size of string
Cause: Afile was specified for inclusion in a backup set but it has a logical block
size different from the rest of the files in the backup set. All files in abackup set
must have the same logical block size.
Action: Specifya file that has the same block size as the rest of the files in the
backup set. The conversation is still active and more files can be specified.