title: IntelliSense cannot open source file
body: <p>I started working as a research fellow at my university and was instructed to develop a component for an already existing application written in C++ using an in-house framework, also developed in C++.</p>
  
  <p>Currently I am struggling with properly setting up the project in Visual Studio 2017.
  Whenever I try to include a file from the framework, IntelliSense complains about not being able to open the file.</p>
  
  <p>However, following things add to the oddness of the problem:</p>
  
  <ul>
  <li><p>The solutions properties are set correctly; the project <strong>DOES</strong> build without any complaints.</p></li>
  <li><p>Writing the '#include'-directive, IntelliSense <strong>DOES</strong> suggest the correct relative path to the header files (i.e. <code>#include &lt;framework/class.h&gt;</code>).</p></li>
  <li><p>I can open the header file from within the source file referencing it, using the '<em>Open Document "class.h"</em>' dialog.</p></li>
  </ul>
  
  <p>I have already came across this:</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/36466938/intellisense-cannot-open-source-file-in-include-path">IntelliSense: Cannot open source file in include path</a></li>
  <li><a href="https://stackoverflow.com/questions/17039251/intellisense-cannot-open-source-file-h">Intellisense cannot open source file &quot;*.h&quot;</a></li>
  </ul>
  
  <p>So far, nothing solved my issue. Did someone come across this issue yet?</p>
  
  <p><strong>TL;DR</strong></p>
  
  <ul>
  <li>Everything compiles fine.</li>
  <li>"C/C++ -> General -> Additional Include Directories" is set properly.</li>
  <li>"VC++ Directories -> Include Directories" is set as well.</li>
  <li>IntelliSense properly suggests header file, when writing include directive.</li>
  <li><strong>BUT</strong> IntelliSense reportedly fails to open the file, thus not indexing it.</li>
  <li>I am stuck with a fancy but resource hungry text editor.</li>
  </ul>
  
  <p>EDIT:</p>
  
  <p>I am working on a MacBook "13 2016; installed Windows 10 Pro 64-bit via Bootcamp.</p>