title: Visual Studio not finding boost include files in release mode (works in debug)
body: <p>I'm using boost with Visual Studio 2013 Express.</p>
  
  <p>Visual Studio finds the <code>#include &lt;boost/filesystem.hpp&gt;</code> in Debug mode, but not in Release mode.</p>
  
  <p>When I try to compile in Release mode, it says: </p>
  
  <p><code>Error  1   error C1083: Cannot open include file: 'boost/filesystem.hpp': No such file or directory</code></p>
  
  <p>When I right click on the <code>#include</code> directive to open the file manually, it works in Debug configuration, but again not in Release, there it says:</p>
  
  <p><code>File 'boost/filesystem.hpp' not found in current source file's directory or in build system paths.</code></p>
  
  <p>I checked the build configurations and </p>
  
  <ul>
  <li>C/C++ - > General -> "Additional Include Directories"</li>
  <li>Linker -> General -> "Additional Library Directories"</li>
  <li>Linker -> Input -> "Additional Dependencies"</li>
  </ul>
  
  <p>Are the same for both configurations.</p>
  
  <p>Do I need to edit the "build system paths", as the error says? I thought that was what the three options above do. </p>
  
  <p>What else could cause this problem?</p>