title: Failed to launch IBCocoaTouchImageCatalogTool via CoreSimulator spawn
body: <p>I have an Xcode project which was downloaded from the internet so I don't know which Xcode version was used to write it but the language is Swift 2. I opened it in Xcode 7.1 beta 1 and I get the following compile time error.</p>
  
  <p><strong>Failed to launch IBCocoaTouchImageCatalogTool via CoreSimulator spawn</strong></p>
  
  <p><a href="https://i.stack.imgur.com/YgVD5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/YgVD5.png" alt="enter image description here"></a></p>
  
  <p>I deleted the DerviedData foler, cleaned and build the project several times. Tried converting the project to latest Swift syntax but it says there's nothing to convert.</p>
  
  <p>I'm all outta ideas. Suggestions?</p>