I'm having an unsolved bug in my code. The following code-snippet is working well within the simulator but not on a real iPhone device (tested on an iPhone SE 1.gen and iPhone 8, both with iOS 14.0.1. The line "if let nnSData = NSData(...)" is still working within the simulator but not on real Hardware. Could it be a bug in NSData? Or a bug in iOS? Or do I have a security problem with user rights of the file containing the data I want to read? Comments would be appreciated. ****************************************************** static func loadBaseaArray() -> [Basea]? {         let fullPath = URL(fileURLWithPath: urlpathAa.path)       //the following works in Simulator only::::::::::::::::::::::::::::::::         if let nnsData = NSData(contentsOf: fullPath)         do {             let data = Data(referencing:nnsData)             if let result = try NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(data) {                 return (result as? [BaseaClass])?.map{$0.basea} .......***********************************************************