title: Source Lookup Path is correct but debugger can't find file (Eclipse EE IDE)?
body: <p>When debugging stepping over each line does work. </p>
  
  <p>Stepping into a function located in another file debugger displays:  <code>Source not found.</code></p>
  
  <p>Also displays option for <code>Edit Source Lookup Path...</code> but the correct package is listed there.<br>
  (Also tried pointing with the directory path.)</p>
  
  <p>No other breakpoints set, as is a common solution.</p>
  
  <p>Any point in the right direction is helpful.  </p>
  
  <p>Thank You.</p>
  
  <p>Thread[main] in the debugger window:</p>
  
  <pre><code>Thread [main] (Suspended)   
      ClassNotFoundException(Throwable).&lt;init&gt;(String, Throwable) line: 217   
      ClassNotFoundException(Exception).&lt;init&gt;(String, Throwable) line: not available 
      ClassNotFoundException.&lt;init&gt;(String) line: not available   
      URLClassLoader$1.run() line: not available  
      AccessController.doPrivileged(PrivilegedExceptionAction&lt;T&gt;, AccessControlContext) line: not available [native method]   
      Launcher$ExtClassLoader(URLClassLoader).findClass(String) line: not available   
      Launcher$ExtClassLoader.findClass(String) line: not available   
      Launcher$ExtClassLoader(ClassLoader).loadClass(String, boolean) line: not available 
      Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: not available 
      Launcher$AppClassLoader.loadClass(String, boolean) line: not available  
      Launcher$AppClassLoader(ClassLoader).loadClass(String) line: not available  
      MyMain.&lt;init&gt;() line: 24    
      MyMain.main(String[]) line: 36  
  </code></pre>