In Xcode 7.0 using Swift 2.0, I drag a SKScene file into my main scene to create a SKReferenceNode. It's seems to work, the scene is embedded.
People from Apple showed this in a video from the last WWDC.
But when I run the app, I've got this error :
*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: '*** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (SKReferenceNode)'
Did I miss something ?