title: Interface Builder could not open the document ".xib" because it does not exist
body: <p>I am localizing an app, following the steps listed <a href="http://www.icanlocalize.com/site/tutorials/iphone-applications-localization-guide/" rel="noreferrer">here</a>. I have successfully achieved that with around 45 .xib's, while just 4 of them gives me this error:</p>
  
  <p>"Interface Builder could not open the document ".xib" because it does not exist."</p>
  
  <p>when I move them from their original position. I try to move them from their Project/Classes/Example.xib position to the localized one on Project/en.lproj/Example.xib.</p>
  
  <p>Why can't this .xib files be moved?</p>