title: The document "Main.storyboard" could not be be opened
body: <p>I'm using Git and we are 2 people coding together. I pulled my friend's code, run it and it worked as it should be. Then I merged our parts and cleaned conflicts (almost all of them were in storyboard). Since i'm doing this merge process for a while, i'm not all stranger for these details. 
  However, when i run the merged version of code, i get the error:</p>
  
  <blockquote>
    <p>The document "Main.storyboard" could not be opened. The operation
    couldn’t be completed. (com.apple.InterfaceBuilder error -1.)</p>
  </blockquote>
  
  <p>I can't open storyboard as interface builder either. When i try it, I get the same error. I read <a href="https://stackoverflow.com/questions/12725116/the-document-mainstoryboard-storyboard-could-not-be-opened">previous post</a> about this error but as I mentioned, I can open and run both versions of code in my XCode before merge. Thus, there is not a font or attributed string problem. </p>
  
  <p>What may be the problem?</p>