I've been using the new template for a document-based SwiftUI app. While you get a lot of file-management "for free" in the new template, as it stands in the iOS version users have to back out of the file to the file browser to change the filename. I want to create an opportunity for the user to rename the file while it is open. Here's a sample project focused on the issue: https://github.com/stevepvc/DocumentRenamer In the code, I've added to the template code a simple UI with a textfield for the user to enter a new name. When the user hits the "rename" button, the app checks to see if the URL with that name component is available, appending a suffix if necessary to create a target url. func getTargetURL() -> URL { 		let baseURL	=	self.fileurl.deletingLastPathComponent() 		print("filename: \(self.filename)") 		print("fileURL: \(self.fileurl)") 		print("BaseURL: \(baseURL)") 		var target = URL(fileURLWithPath: baseURL.path + "/\(filename).exampletext") 		var nameSuffix = 1 		 		while (target as NSURL).checkPromisedItemIsReachableAndReturnError(nil) { 				 				target = URL(fileURLWithPath: baseURL.path + "/\(filename)-\(nameSuffix).sermon") 				print("Checking: \(target)") 				nameSuffix += 1 	 } 		print("Available Target: \(target)") 		return target } It then attempts to rename the file, and this is when I am stuck. I have tried several methods, most recently the following: func changeFilename(){ 		let target	= getTargetURL() 		var rv = URLResourceValues() 		let newFileName = target.deletingPathExtension().lastPathComponent 		rv.name = newFileName 		do { 				if fileurl.startAccessingSecurityScopedResource(){ 						try fileurl.setResourceValues(rv) 						fileurl.stopAccessingSecurityScopedResource() 				} 		} catch { 				print("Error:\(error)") 		} } But I keep getting the following error whenever I run the app on a device: Domain=NSCocoaErrorDomain Code=513 "You don’t have permission to save the file “Untitled” in the folder “DocumentRenamer”." I have also tried this without the startAccessingSecurityScopedResource() check, and alternatively have tried creating a helper class as follows: class FileMover: NSObject { func moveFile(originalURL: URL, updatedURL:URL) -> Bool { 		let coordinator = NSFileCoordinator(filePresenter: nil) 		var writingError: NSError? = nil 		var success : Bool = true 		print("moving file") 		coordinator.coordinate(writingItemAt: originalURL, options: NSFileCoordinator.WritingOptions.forMoving, error: &writingError, byAccessor: { (coordinatedURL) in 				do { 						try FileManager.default.moveItem(at: coordinatedURL, to: updatedURL) 						success = true 						print("file moved") 						 				} catch { 						print(error) 						success = false 				} 		}) return success 		 } } But using this method locks up the app entirely. What is the correct method for renaming a file in the app's container, particularly using the new Swiftui Document based template?