I copied over a xcdatamodeld file from one project to another, thinking i would save myself sometime recreating the same file. But now in the new app I'm getting a "Thread 1: "An NSManagedObject of class 'Customer' must have a valid NSEntityDescription."" Error. I have a feeling I missed a step bringing the file over from the other app.... It works fine in old app??

As soon as I posted this issue a light finally came on in my head what I forgot to do...

In my @main file I failed to add in my @StateObject private var dataController = DataController() and the ContentView() .environment(.managedObjectContext, dataController.container.viewContext)

below is the code that fixed the issue.. I don't know why it took posting the issue to get my brain working but it did...

import SwiftUI

@main
struct QuiltersDungeonApp: App {
    @StateObject private var dataController = DataController()
    var body: some Scene {
        WindowGroup {
            ContentView()
                .environment(\.managedObjectContext, dataController.container.viewContext)
        }
    }
}