Cause: A 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. See the solution below.
Error solution: Specify 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.
Database version: Oracle 11g Release 2 (11.2)