Offline mapTile Not working in simulator, iOS 8.1 XCode 7.3.1

This is nice simple example code, but unfortunately I cannot make it to run. Could you points me with some options. Thank you.
Error like this when I select Offline segment:
<MKTileOverlay: 0x7d04cb70>: Error loading URL file:///Users/veyhong/Library/Developer/CoreSimulator/Devices/16F8D2E0-445E-4102-829F-EB266FF9CB40/data/Containers/Bundle/Application/B2DA2A64-F7DC-4F86-BD3A-8B777DF7B186/CustomMap.app//tiles/6/49/29.png: Error Domain=NSURLErrorDomain Code=-1100 "The requested URL was not found on this server." UserInfo=0x7d081cd0 {NSErrorFailingURLStringKey=file:///Users/veyhong/Library/Developer/CoreSimulator/Devices/16F8D2E0-445E-4102-829F-EB266FF9CB40/data/Containers/Bundle/Application/B2DA2A64-F7DC-4F86-BD3A-8B777DF7B186/CustomMap.app//tiles/6/49/29.png, NSErrorFailingURLKey=file:///Users/veyhong/Library/Developer/CoreSimulator/Devices/16F8D2E0-445E-4102-829F-EB266FF9CB40/data/Containers/Bundle/Application/B2DA2A64-F7DC-4F86-BD3A-8B777DF7B186/CustomMap.app//tiles/6/49/29.png, NSLocalizedDescription=The requested URL was not found on this server., NSUnderlyingError=0x7e8787b0 "The requested URL was not found on this server."}