rtesseract: RTesseract::ConversionError in Ruby on Rails app

• Installed gems fine, tesseract and imagemagik already installed on server.
• Running tesseract command manually in terminal works successfully.
• Running application locally on OS X enviroment works successfully.

uploaded_io = params[:picture]
    File.open(Rails.root.join('public', 'uploads', uploaded_io.original_filename), 'wb') do |file|
      file.write(uploaded_io.read)
    end
    dl = RTesseract.new(Rails.root.join('public', 'uploads',uploaded_io.original_filename).to_s)
    @string = dl.to_s

Only once I’ve deployed to my development server does it all break returning the error. The files are been copied across to the public/uploads folder correctly. And are readable as tested by running the tesseract command outside of ruby on the same file.

The result when running the app is RTesseract::ConversionError on the dl.to_s action

Unsure on what I’m missing…