title: The jar of this class file belongs to container 'Android Dependencies' which does not allow source modifications to source attachments on its entries
body: <p>I have a library project and another project which uses some classes from the library project. As soon as I am setting a break point in one of the library classes, and my app stops at the break point, Eclipse shows me the error message</p>
  
  <blockquote>
    <p>Source not found</p>
    
    <p>The jar of this class file belongs to container 'Android Dependencies'
    which does not allow source modifications to source attachments on its
    entries</p>
  </blockquote>
  
  <p>Can someone help me?</p>
  
  <p><img src="https://i.stack.imgur.com/JzatW.png" alt="the error message"></p>