title: Ruby FileUtils: copying file
body: <p>Hello I try to copy file with help of <code>FileUtils</code></p>
  
  <pre><code>file_path = "C:/example/abc.txt"
  destination_directory = "C:/destination"
  
  FileUtils.cp(file_path, destination_directory)
  </code></pre>
  
  <p>When I try run this code there is an error <code>can't convert Fixnum into String</code>.
  Where did I make a mistake?</p>
  
  <p>Thanks!</p>