title: the project was not build since the source file could not be read
body: <p>I am trying to build an open source android project, but just after build starts, I get this error:  </p>
  
  <p>The project was not built since the source file   <code>/android/build/tools/droiddoc/test/generics/src/com/android/generics/TestComparable.java</code><br>
  could not be read</p>
  
  <p>I tried everything I found, <strong>Refresh > Clean > build / Restart > refresh > Clean > build</strong>.</p>
  
  <p>I understand it could be an encoding problem since that file may come from a repository, and was stored on windows or something.  </p>
  
  <p>If you know a solution or a possible solution, please help, I am out of ideas. </p>