Oracle Message RMAN-06192 - maximum value for MAXPIECESIZE or MAXSETSIZE must be between 1 Kb and 2048 Gb

ERRORmaximum value for MAXPIECESIZE or MAXSETSIZE must be between 1 Kb and 2048 Gb
CAUSEInput size for MAXPIECESIZE or MAXSETSIZE was out of range.
ACTIONSpecify a valid size and retry the command.