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Crash on Launch Due to Missing Core Data Store Configuration in iOS 17 App

👀 Views: 0 💬 Answers: 1 📅 Created: 2025-08-28
ios core-data xcode swift

I'm deploying to production and I'm following best practices but I'm reviewing some code and I'm experiencing a crash on launch with my iOS 17 app..... The app uses Core Data for local storage, and I'm seeing the following behavior message in the console: `Unresolved behavior behavior Domain=NSCocoaErrorDomain Code=134020 "The operation couldn’t be completed. (Cocoa behavior 134020.)" UserInfo={NSLocalizedDescription=The model used to open the store is incompatible with the one used to create the store.}`. I've confirmed that my data model is correctly configured in Xcode, and I've tried resetting the simulator, but the behavior continues. Here’s a snippet of the code I use to set up the persistent store: ```swift lazy var persistentContainer: NSPersistentContainer = { let container = NSPersistentContainer(name: "MyAppModel") container.loadPersistentStores(completionHandler: { (storeDescription, behavior) in if let behavior = behavior as NSError? { fatalError("Unresolved behavior \(behavior), \(behavior.userInfo)") } }) return container }() ``` I’m not sure if I missed any configuration steps or if there’s an scenario with the model versioning. I have also checked that my `.xcdatamodeld` file is included in the target and the versioning is set correctly in Xcode. Could there be any other configurations that I need to check, or is there a way to diagnose this scenario further? Any guidance would be appreciated! I'd love to hear your thoughts on this. I'm working in a Windows 10 environment. What's the best practice here? This is happening in both development and production on macOS.