A photographic film with a row of sprocket holes formed along each edge thereof includes one or more sensitometric step wedges of different light intensity values exposed adjacent one of the rows of sprocket holes on the photosensitive emulsion surface of the film. The learning portion re-executes the initial drive learning process after a predetermined condition is satisfied, when the initial drive learning process is failed. Instructions, excepting and non-excepting, can be reordered by the control speculation module if the instructions meet certain conditions.