Tom, thanks for taking time to share your solution. It did solve my problem, thanks alot! Now there are other problems that I need to look into. When I try to save something to Core data following error appears: [error] error: Illegal attempt to save to a file that was never opened. "This NSPersistentStoreCoordinator has no persistent stores (unknown). It cannot perform a save operation.". No last error recorded. My save code: let t = Trans(context: self.moc) t.id = UUID()	 t.amount = 128 do { try self.moc.save() } catch let error as NSError { print(error) } Anyone that has an idea?

Thanks for the answer. Yepp, multiple times.. Recreated the project multiple times also.