title: Why does my application crash every time I try to show two child view controllers that are GLKViewControllers?
body: <p>Example project: <a href="http://d.pr/f/v7zD" rel="nofollow">http://d.pr/f/v7zD</a></p>
  
  <p>I'm trying to build an app that would show two <code>GLKViewController</code>s. I'm using Storyboards, so I have my main view controller (the initial one) with two container views in it that branch off into two UIViewControllers that have a custom class of <code>OpenGLViewController</code> (which is just a subclass of <code>GLKViewController</code> I've created).</p>
  
  <p>The views within those two child view controllers are <code>GLKView</code>s.</p>
  
  <p>Yet, every time I run it I get this error as soon as it launches:</p>
  
  <blockquote>
    <p><em>*</em> Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[GLKViewController loadView] loaded the "BYZ-38-t0r-view-8bC-Xf-vdC" nib but didn't get a GLKView.'</p>
  </blockquote>
  
  <p>How do I make this work? I'm pulling my hair out.</p>