title: Unknown class in Interface Builder file
body: <p>Why am I still getting this error when I run my iPhone app?  The file is a ViewController that I have been working to delete and replace, but it just won't die.  As far as I know, I don't have any reference (string or otherwise) to this file in my project.</p>
  
  <ul>
  <li>I have deleted the related file (I'm trying to get rid of it.) </li>
  <li>I have cleaned the project and rebuilt.</li>
  <li>I have "Reset Content and Settings" in my simulator.</li>
  <li>I have done a grep (grep -i -r "TheClassName" *) and nothing matches except my UserInterfaceState.xcuserstate file.</li>
  <li>I have searched the code using XCode's Find/Replace tab.</li>
  <li>I have double checked my Build Phases and am pretty sure it isn't in there (its a large project).</li>
  </ul>
  
  <p>Any other ideas?  I've spent way too many hours trying to figure this simple thing out; I must be missing something.</p>
  
  <p>Thanks!</p>