title: Waf - Source not found: None
body: <p>I'm trying to compile a 64-bit application using <code>Waf</code>, but the <code>wscript</code> is returning the error:</p>
  
  <blockquote>
    <p><code>Source not found: None</code>.</p>
  </blockquote>
  
  <p>I have heard that this can be due to improper indentation or mixed character encodings, which my <code>wscript</code> does not have. </p>
  
  <p>Any possible solutions/leads to what may be causing this?</p>