title: netbeans can't find C++ header file in same directory
body: <p>In one particular cpp file (abc.cpp), when I ask to navigate "to Declaration/Definition", it says "cannot open element "abc.h"". This functionality works for other header files. This in itself is not a big problem, but it also means that auto-complete and syntax highlighting doesn't work for this file.</p>
  
  <p>Some extra info:</p>
  
  <ul>
  <li>The header file is in the same directory as the cpp file and both are included in the active netbeans project</li>
  <li>I was able to enter the header file name with auto-complete, i.e. <code>#include "ab&lt;ctrl-space&gt;"</code></li>
  <li>clicking the "Go to header/source" button works both ways for this cpp/h pair.</li>
  <li>right-clicking on the class name in the header file, and then selecting "go to source" brings me to the cpp file, as usual.</li>
  <li>in other cpp files the connection to the header file is working fine, as is autocomplete &amp; syntax highlighting</li>
  <li>netbeans has a green square in the top right of the header file window, indicating "no errors"</li>
  <li>I have tried deleting my cache as explained <a href="https://stackoverflow.com/a/26936893/1295595">here</a></li>
  <li>I'm using netbeans v8.0.2 on OpenSuse 13.2</li>
  </ul>