Hi , I am currently encountering issues while running a Titanium application using Xcode 16. I would like to request your guidance on resolving the following problems: When running the Titanium app on a real device, I receive the following warning in Xcode and the app does not proceed beyond this point and the app is crashing on launch. warning: (arm64) /Users/Library/Developer/Xcode/DerivedData/Procedures-hamsarmfbtnowbcdocpmydtuafnp/Build/Products/Debug-iphoneos/Procedures.app/Procedures empty dSYM file detected, dSYM was created with an executable with no debug info. Thank you

I am having issues loading my model from a Swift Package with the following structure: | Package.swift | Sources | - | SamplePackage | - | - Core | - | - | - SamplePackageDataStack.swift | - | - | - DataModel.xcdatamodeld | - | - | - | - Model.xcdatamodel ( <- is this new? ) As mentioned, I am not required to list the xcdatamodeld as a resource in my Package manifest. When trying to load the model in the main app, I am getting CoreData: error:  Failed to load model named DataModel Code: In my swift Package: public class SamplePackageDataStack: NSObject {     public static let shared = SamplePackageDataStack()     private override init() {}     public lazy var persistentContainer: NSPersistentContainer = { let container = NSPersistentContainer(name: "DataModel") container.loadPersistentStores(completionHandler: { (storeDescription, error) in             if let error = error as NSError? {                 fatalError("Unresolved error \(error), \(error.userInfo)")             }         })         return container     }()     /// The managed object context associated with the main queue. (read-only)     public var context: NSManagedObjectContext {         return self.persistentContainer.viewContext     }     public func saveContext () {         if context.hasChanges {             do {                 try context.save()             } catch {                 let nserror = error as NSError                 fatalError("Unresolved error \(nserror), \(nserror.userInfo)")             }         }     } } Main App: import SamplePackage class ViewController: UIViewController { override func viewDidLoad() { &#9;&#9;&#9;&#9;&#9;super.viewDidLoad() &#9;var container = SamplePackageDataStack.shared.persistentContainer         print(container) &#9;&#9;} }

Hey all wondering if anyone has seen this new in xcode 26 beta 2 it seems any NIBS with a UISwitch will 'error' saying please submit a feed back and attach the log, i did submite a feedback but looking at the log it simply says : the tool closed the connection (IBAgent-iOS) then if you just build again it builds fine and runs fine, but if you switch from simulator to device and build the error will happen again, but same thing build again and it works. I opened my NIBS with the switch and they open just fine, no errors or anything so im wondering if its something in the build system. For any xcode engineers here: here is my feedback number 18348463

I'm not seeing the Accessibility or Attributes Inspectors in Xcode 26. Were these features removed? Xcode 16 Xcode 26

We are working on a Unity iOS app for the App Store. We are working with different SDKs and plugins(Firebase, Facebook, CleverTap, AVpro, DTT, etc ). We can make an Xcode export build from Unity for the iOS platform. But in Xcode, we are getting errors while building an archive for our app. `chmod: /Users/MacName/Library/Developer/Xcode/DerivedData/Unity-iPhone-gfqpbnsrmtehefgrsrsapwpcyrzk/Build/Intermediates.noindex/ArchiveIntermediates/Unity-iPhone/IntermediateBuildFilesPath/Unity-iPhone.build/Release-iphoneos/artifacts/arm64/buildstate/Il2CppOutputProject/IL2CPP/build/deploy_arm64/il2cpp: No such file or directory chmod: /Users/MacName/Library/Developer/Xcode/DerivedData/Unity-iPhone-gfqpbnsrmtehefgrsrsapwpcyrzk/Build/Intermediates.noindex/ArchiveIntermediates/Unity-iPhone/IntermediateBuildFilesPath/Unity-iPhone.build/Release-iphoneos/artifacts/arm64/buildstate/Il2CppOutputProject/IL2CPP/build/deploy_arm64/il2cpp-compile: No such file or directory chmod: /Users/MacName/Library/Developer/Xcode/DerivedData/Unity-iPhone-gfqpbnsrmtehefgrsrsapwpcyrzk/Build/Intermediates.noindex/ArchiveIntermediates/Unity-iPhone/IntermediateBuildFilesPath/Unity-iPhone.build/Release-iphoneos/artifacts/arm64/buildstate/Il2CppOutputProject/IL2CPP/build/deploy_arm64/bee_backend/mac-arm64/bee_backend: No such file or directory /Users/MacName/Library/Developer/Xcode/DerivedData/Unity-iPhone-gfqpbnsrmtehefgrsrsapwpcyrzk/Build/Intermediates.noindex/ArchiveIntermediates/Unity-iPhone/IntermediateBuildFilesPath/Unity-iPhone.build/Release-iphoneos/GameAssembly.build/Script-C62A2A42F32E085EF849CF0B.sh: line 27: /Users/MacName/Library/Developer/Xcode/DerivedData/Unity-iPhone-gfqpbnsrmtehefgrsrsapwpcyrzk/Build/Intermediates.noindex/ArchiveIntermediates/Unity-iPhone/IntermediateBuildFilesPath/Unity-iPhone.build/Release-iphoneos/artifacts/arm64/buildstate/Il2CppOutputProject/IL2CPP/build/deploy_arm64/il2cpp: No such file or directory Command PhaseScriptExecution failed with a nonzero exit code Please help anyone to resolve this issue. Unity version - 2023.2.20f1 Xcode version - 16.4

When I build the app, a block symbol appears on the app icon in the Debug Area at the bottom. What is the reason for this?

Hi everyone, We're developing an AR app using Unity with Vuforia for object detection. Our app works well in full-screen mode, including detection and post-detection phases. However, we're facing a specific issue in iPad Split View multitasking mode. Problem: The AR camera (Vuforia-based) freezes during object detection if another app is opened in Split View. Post-detection, everything works fine in Split View. The problem only occurs during detection. Testing Environment: iPadOS 16+ Unity with Vuforia plugin Using EnableMultitaskingCameraAccess() method with AVFoundation to support camera multitasking AR scene is set up properly with detection capabilities in full-screen

I have Xcode 16 and am setting everything to a minimum target deployment to 17.5, and am using import Speech Never the less, Xcode doesn't can't find it. At ChatGPT's urging I tried going back to Xcode 15.3, but that won't work with Sequoia Am I misunderstanding something? Here's how I am trying to use it: if templateItems.isEmpty { templateItems = dbControl?.getAllItems(templateName: templateName) ?? [] items = templateItems.compactMap { $0.itemName?.components(separatedBy: " ") }.flatMap { $0 } let phrases = extractContextualWords(from: templateItems) Task { do { // 1. Get your items and extract words templateItems = dbControl?.getAllItems(templateName: templateName) ?? [] let phrases = extractContextualWords(from: templateItems) // 2. Build the custom model and export it let modelURL = try await buildCustomLanguageModel(from: phrases) // 3. Prepare the model (STATIC method) try await SFSpeechRecognizer.prepareCustomLanguageModel(at: modelURL) // ✅ Ready to use in recognition request print("✅ Model prepared at: \(modelURL)") // Save modelURL to use in Step 5 (speech recognition) // e.g., self.savedModelURL = modelURL } catch { print("❌ Error preparing model: \(error)") } } }

If I create a playground project that uses a JSONDecoder I get the following error. The LLDB RPC Server has crashed. The crash log is located at ~/Library/Logs/DiagnosticReports and has a prefix 'lldb-rpc-server'. Please file a bug and attach the most recent crash log. I have raised feedback for this, FB17702087, but I hope that there may be a workaround. The code I am using to try and get this to work is from The Apple Developer Documentation - JSON Decoder var greeting = "JSON Test 3" struct GroceryProduct: Codable { var name: String var points: Int var description: String? } let json = """ { "name": "Durian", "points": 600, "description": "A fruit with a distinctive scent." } """.data(using: .utf8)! let decoder = JSONDecoder() let product = try decoder.decode(GroceryProduct.self, from: json) print(product.name) // Prints "Durian" A screenshot of the playground showing the error The crash log (the file type has been changed to txt as ips file types cannot be selected for upload. lldb-rpc-server-2025-05-28-140832.txt

The latest build MacOS 26.0 Beta 25A5316i has introduced an error with the conversion tool ProjectedMediaConversion example shown at WWDC Error. I trying recompiling, but with same error: dyld[5902]: Symbol not found: _$sSo18AVAssetWriterInputC12AVFoundationE19PixelBufferReceiverC6append_4with9isolationy9CoreVideo010CVReadOnlyeF0C_So6CMTimeaScA_pSgYitYaKFTjTu Referenced from: /Users/***/Library/Developer/Xcode/DerivedData/ProjectedMediaConversion-elcmxcasetuopvghcomowlupqnuj/Build/Products/Debug/ProjectedMediaConversion Expected in: <129D07B2-72FC-32A1-8162-0E6FD4A5DB2F> /usr/lib/swift/libswiftAVFoundation.dylib

Hi, I am currently working on a MacOS App, where I need the undistortion function of opencv. But after I tried to add opencv to my project, I get following error: unexpected service error: The Xcode build system has crashed. Build again to continue. Cleaning the build folder also doesn't help. Does anyone have an idea what could be the issue? Ryan

I have experienced problems with my app crashing on build (I believe it's while linking) with various combinations of Xcode version and iOS simulator version. It dates back to Xcode 16.3 in my testing, and continues through Xcode 16.4 and all Xcode 26 betas. This occurs whether the project running is UIKit-based or SwiftUI-based. Simply dropping a file with the following code into a project, without even needing to refer to its class anywhere else in the project, produces the crash. import Foundation import WebKit class WebBrowserController: NSObject, ObservableObject, WKNavigationDelegate { var webView: WKWebView override init() { self.webView = WKWebView() super.init() } func findString(_ string: String, completion: @escaping (WKFindResult) -> Void) { let configuration = WKFindConfiguration() webView.find(string, configuration: configuration) { result in completion(result) } } } With Xcode 26 beta 4 I am experiencing this issue with iOS 18.4 and iOS 18.5 simulators, but not with iOSW 18.3 or iOS 26 simulators. The complete history of my testing back to Xcode 16.3 and the problematic iOS versions is included Feedback #FB17737471. The crash message appearing in the Xcode 26 beta 4 console for iOS 18.5 is below: dyld[7438]: Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such file, not in dyld cache), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libswiftWebKit.dylib' (no such file) Library not loaded: /usr/lib/swift/libswiftWebKit.dylib Referenced from: <EF9CE2A7-9F7C-316D-869F-087AECC76C53> /Users/dennisbirch/Library/Developer/CoreSimulator/Devices/CD82152C-E407-4350-B8AE-C15B5304CA05/data/Containers/Bundle/Application/94F80728-CECE-4C24-84CF-C435069B276A/SwiftUIMissingWebViewLib.app/SwiftUIMissingWebViewLib.debug.dylib Reason: tried: '/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/libswiftWebKit.dylib' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/swift/libswiftWebKit.dylib' (no such file), '/usr/lib/swift/libswiftWebKit.dylib' (no such f dyld config: DYLD_SHARED_CACHE_DIR=/Library/Developer/CoreSimulator/Caches/dyld/25A5316i/com.apple.CoreSimulator.SimRuntime.iOS-18-5.22F77/ DYLD_ROOT_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libLogRedirect.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libMainThreadChecker.dylib:/usr/lib/libRPAC.dylib:/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libViewDebuggerSupport.dylib DYLD_FRAMEWORK_PATH=/Users/dennisbirch/Library/Developer/Xcode/DerivedData/SwiftUIMissingWebViewLib-dbhkxwiichsdtygsnxqszkylbivv/Build/Products/Debug-iphonesimulator DYLD_FALLBACK_FRAMEWORK_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks DYLD_FALLBACK_LIBRARY_PATH=/Library/Developer/CoreSimulator/Volumes/iOS_22F77/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.5.simruntime/Contents/Resources/RuntimeRoot/usr/lib

Hello, FWIW I've been developing enterprise iOS apps going on 10 years and haven't seen a bug like this. It's a major blocker. Any advice is welcome. Pulled latest from my team's repository . I ran into a build issue. Reinstalled cocoa pods, resolved swift packages, cleared cache, and then tried to update my iOS simulators... Since then, everything is bricked. Can't side load an app or download a simulator. When I try to download simulator, as suggested by Xcode, I receive the following error: Registering simulator runtime with CoreSimulator failed. Domain: DVTDownloadableErrorDomain Code: 29 User Info: { DVTErrorCreationDateKey = "2025-05-28 19:18:13 +0000"; } Registering simulator runtime with CoreSimulator failed. Domain: DVTDownloadableErrorDomain Code: 29 Mount failed: SUIS premount dissented Domain: com.apple.CoreSimulator.simdiskimaged.SimDiskImageError Code: 10 Failure Reason: the operation is not appropriate (kDAReturnNotPermitted) System Information macOS Version 15.5 (Build 24F74) Xcode 16.3 (23785) (Build 16E140) Timestamp: 2025-05-28T14:18:13-05:00 I've restarted my Mac. I've cleared caches. I cleared project builds and all old simulators. I've reverted to much older previous commits after trying above just in case (even though I've verified no one else on my team is experiencing this issue). Nothing works. I found a post online and tried this command: xcrun devicectl manage ddis update Resulting in this: Host CoreDevice version: 443.19 13:57:32 Updating host DDIs. 13:57:32 Failed to update the host's developer disk images. ERROR: Failed to update developer disk images on the host. (com.apple.dt.CoreDeviceError error 12010 (0x2EEA)) ERROR: Request to update the host's developer disk images failed. (com.apple.dt.CoreDeviceError error 12013 (0x2EED)) ERROR: Failed to update developer disk images on the host. (com.apple.dt.CoreDeviceError error 12010 (0x2EEA)) ERROR: Failed to copy a developer disk image to the underlying system. (com.apple.dt.CoreDeviceError error 12009 (0x2EE9)) NSURL = file:///Library/Developer/CoreDevice/CandidateDDIs/iOS_DDI.dmg DeveloperDiskImageInstallLocation = file:///Library/Developer/DeveloperDiskImages_2D128D6A-770D-4040-8819-C611DC607098.staged/ ERROR: The developer disk image could not be staged on the host. (com.apple.dt.CoreDeviceError error 12045 (0x2F0D)) NSURL = file:///Library/Developer/CoreDevice/CandidateDDIs/iOS_DDI.dmg ERROR: The operation couldn’t be completed. StorageKit claimed that it mounted the disk image at the required path, but the item there is not a disk image. (NSPOSIXErrorDomain error 2 (0x02)) ExpectedMountPoint = /private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/28C3C798-5FB7-45E6-A95C-4CC84A3D7851 NSLocalizedFailureReason = StorageKit claimed that it mounted the disk image at the required path, but the item there is not a disk image. NSURL = file:///Library/Developer/CoreDevice/CandidateDDIs/iOS_DDI.dmg NSLocalizedRecoverySuggestion = This is likely due to a software bug. Please file a bug report including a sysdiagnose. Also, here is the latest from my CoreSimulator logs: May 28 13:50:24 Mac com.apple.ibtool[3680] : Unable to discover any Simulator runtimes. Developer Directory is /Applications/Xcode_16.3.app/Contents/Developer. May 28 13:52:10 Mac com.apple.CoreSimulator.simctl[4509] : Unable to discover any Simulator runtimes. Developer Directory is /Applications/Xcode.app/Contents/Developer. May 28 13:52:44 Mac com.apple.dt.Xcode[948] : Adding runtime disk image '/System/Library/AssetsV2/com_apple_MobileAsset_iOSSimulatorRuntime/6fb1e5fe25ee1c372f7116516e615c556906bd4e.asset/AssetData/090-44150-318.dmg' error: Error Domain=com.apple.CoreSimulator.simdiskimaged.SimDiskImageError Code=10 "Mount failed: SUIS premount dissented" UserInfo={NSLocalizedDescription=Mount failed: SUIS premount dissented, NSLocalizedFailureReason=the operation is not appropriate (kDAReturnNotPermitted)} May 28 13:53:35 Mac com.apple.dt.Xcode[948] : Adding runtime disk image '/System/Library/AssetsV2/com_apple_MobileAsset_iOSSimulatorRuntime/6fb1e5fe25ee1c372f7116516e615c556906bd4e.asset/AssetData/090-44150-318.dmg' error: Error Domain=com.apple.CoreSimulator.simdiskimaged.SimDiskImageError Code=10 "Mount failed: SUIS premount dissented" UserInfo={NSLocalizedDescription=Mount failed: SUIS premount dissented, NSLocalizedFailureReason=the operation is not appropriate (kDAReturnNotPermitted)} May 28 14:21:02 Mac com.apple.dt.Xcode[948] : Adding runtime disk image '/System/Library/AssetsV2/com_apple_MobileAsset_iOSSimulatorRuntime/6fb1e5fe25ee1c372f7116516e615c556906bd4e.asset/AssetData/090-44150-318.dmg' error: Error Domain=com.apple.CoreSimulator.simdiskimaged.SimDiskImageError Code=10 "Mount failed: SUIS premount dissented" UserInfo={NSLocalizedDescription=Mount failed: SUIS premount dissented, NSLocalizedFailureReason=the operation is not appropriate (kDAReturnNotPermitted)} I appreciate any help. Thank you

When renaming A.value, it also causes the value inside the conditional compilation in checkRename to be renamed. How to resolve or avoid this situation? class A { let value = "1" } class B { var value = 0 } func checkRename() { var b = B() #if os(iOS) b.value = 456 #elseif os(macOS) b.value = 789 #endif } Xcode Version 15.4 (15F31d).

Blocker: Registering simulator runtime with CoreSimulator failed.

In Xcode26/iOS26, within an navigation stack, I have a background view that fills the whole screen and the top half is covered by a map view that extends to the edge of the top of the screen. The blurring effect is displaying the blurred background and not the blurred map. Is this expected behavior or a possible bug? In the screen shot, you can see my blue backround blur is being displayed instead of a blurred image of the map that I would expect to see. Am I doing something wrong?

Hi everyone, does anyone also have the problem that e.g. the modifier .classEffect() does not work? it is not recognized, although I have the required versions and languages all up to date. I can't get any further, even ChatGPT was at the end of its wisdom 😬. maybe someone has the same problem and a solution for it. many thanks in advance

I used Xcode to upload to App Store Connect, and I only clicked "Distribute App" once, but the build was uploaded to TestFlight twice, resulting in build numbers 356 and 357 ( I need 356 ). But this doesn’t happen every time. Why would this happen?

On my M4 Mac running macOS 15.5 using Xcode 16.4 & Xcode CLT 16.4, Swift code in my Swift Package Manager 5.9 project (https://github.com/mas-cli/mas) builds fine against some included Objective-C headers via the following command line: swift build -c release But cannot find modules for the included Objective-C headers when building inside Xcode 16.4 or with the following command line on the same Mac: xcodebuild -scheme mas -configuration Release -destination platform=macOS,arch=arm64,variant=macos The error is: Sources/mas/AppStore/AppleAccount.swift:9:16: error: no such module 'StoreFoundation' How can I get Xcode / xcodebuild to work? Note that the project is normally built by running: Scripts/build which runs: swift build -c release after running the following script, which must be run before any build (swift, Xcode, or xcodebuild) because it generates a necessary file (Sources/mas/Package.swift): Scripts/generate_package_swift I've tried moving the Objective-C headers into include subfolders of their existing module folders, using double quotes instead of angle brackets for the #import statements, having module.modulemap files in the include subfolders or their parent module folder, and moving the module folders one level up the file hierarchy, to no avail. I've also tried various changes to the root-level Package.swift (not the generated one deeper in the hierarchy, which isn't inclined in the build configuration), like making separate library targets for each of the Objective-C modules, various swiftSettings & linkerSettings, etc. Maybe some of those changes would have helped, but maybe they were in incorrect combinations. Thanks for any help.

I have a service that has been running on a 3x cluster of headless M1 Mac Studios since Ventura, and before that on headless Mac minis since Monterey. Now, after updating the Studios from Sonoma to Sequoia, response times have slowed to a crawl. For example, generating and sending a 150KB PDF file normally takes around 20 milliseconds. Now it takes over 15 SECONDS! The daemon code didn't change between updates. The issue seems to center around TSO on the ethernet port. Connecting via a port without TSO works as expected. But the 10 GB ethernet port on the Studio has built-in TSO. I've tried to disable TSO using sudo sysctl -w net.inet.tcp.tso=0. This works for an hour or so before the daemon eventually becomes unresponsive. At this point the daemon has to be terminated and restarted. So for now I'm having to use cheap USB-C to Ethernet adapters to connect the Mac Studios. Is there a configuration setting I'm missing for proper TSO in Network Framework?