Oracle Solution for Error ora-19597

ORA-19597: file string block size string does not match set block size of string

What triggered the Error:

file 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 a backup set must have the same logical block size.

What should we do to fix it:

ecify a 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.