When using a Pathname instead of a String for the file argument, I get an error. See the following code: ``` require 'exiftool' require 'pathname' path=Pathname.new('p./public/images/test.jpg') Exiftool.new(path) ``` will result in `NoMethodError: undefined method empty?' for #<Pathname:p./public/images/test.jpg>` the workaround is to convert the Pathname to a String: `Exiftool.new(path.to_s)` _Ruby version 2.3.1_