Fix code to read in two text files in Swift 4, OSX, when one file name is selected.

I have the following code to read in two text files located in the same directory. It reads in the first file but then says I don't have the permission to read in the second throwing the following error: The file “[login to view URL]” couldn’t be opened because you don’t have permission to view it. @IBAction func OpenDVAFile(_ sender: Any) { let dialog = NSOpenPanel(); [login to view URL] = "Choose a .dva or .tsn file"; [login to view URL] = true; [login to view URL] = false; [login to view URL] = true; [login to view URL] = true; [login to view URL] = false; [login to view URL] = ["dva", "tsn"]; if ([login to view URL]() == [login to view URL]) { let result = [login to view URL] // Pathname of the file if (result != nil) { do { // Remove the file extension let baseFile = result?.deletingPathExtension() // Open the TSN File let tsnFileURL = baseFile?.appendingPathExtension("TSN") let tsnFileString = try String( contentsOf: tsnFileURL!) // Open the DVA File let dvaFileURL = baseFile?.appendingPathExtension("DVA") let dvaFileString = try String( contentsOf: dvaFileURL!) } catch { print( [login to view URL] ) } } } }