title: PhpStorm and Symfony 3 - For some bundles the namespace is not found
body: <p>That the namespace of some of my bundles in Symfony 3 is not recognized in PhpStorm.</p>
  
  <p>It affects:</p>
  
  <ul>
  <li>my own bundles and </li>
  <li>external bundles (in the vendor-folder), such as the FOM-Rest-Bundle</li>
  </ul>
  
  <p>(see also the attached screenshot) </p>
  
  <p><strong>What I already tried:</strong></p>
  
  <ul>
  <li><p>Reinstalling the Symfony-Plugin (Now it is installed, but the problem still exists)</p></li>
  <li><p>Change directories in <code>Preferences &gt; Languages &amp; Frameworks &gt; Symfony</code></p></li>
  <li><p>Under <code>Preferences &gt; Project: MyProject</code> I marked the folders (for example the vendor folder) as 'Source' or 'Resource Root'</p></li>
  <li><p>Of course, after changing the settings I restarted PhpStorm.</p></li>
  </ul>
  
  <p>Can anybody help me?</p>
  
  <p><a href="https://i.stack.imgur.com/qPnTx.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qPnTx.png" alt="Class AppKernal"></a></p>