title: Core data: Unable to load class named "CDAccount"
body: <p>I've recently downloaded iOS 8 to make sure that my existing app works properly with it, but I'm getting a warning in the debugger on launch:</p>
  
  <pre><code>"CoreData: warning: Unable to load class named 'CDAccount' for entity 'CDAccount'.  
  Class not found, using default NSManagedObject instead."
  </code></pre>
  
  <p>After some research, it seems like people have had similar issues when using Core Data in Swift, but all my code is in Objective-C (and the data model hasn't changed for at least 6 months).</p>
  
  <p>Any advice is much appreciated, I'm really nervous that my app isn't going to function properly once people start upgrading to iOS 8!</p>