title: Compiling Issue using VSC on ONE Simulator
body: <p>I just install ONE Simulator on my pc with updated JDK and JRE 1.8.0_321 using Visual Studio Code text editor. When I compile the main file, here is the problem mentioned:</p>
  <p>Exception in thread &quot;main&quot; java.lang.Error: Unresolved compilation problems:</p>
  <pre><code>    Settings cannot be resolved
      DTNSimTextUI cannot be resolved to a type
      Settings cannot be resolved
      DTNSimGUI cannot be resolved to a type
  
      at core.DTNSim.main(DTNSim.java:83)
  </code></pre>
  <p>May I know, what is the problem here and how can I solve this problem?</p>
  <p>Thanks</p>