Thanks so much for your help @Scott, I'm gonna try this now!!

First thanks so much for your reply. I'll attach here thee code snippet import SwiftUI struct ContentView: View { var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundColor(.accentColor) Text("Hello, world!") } .onAppear{ ProductManager().loadProduct() } .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } Below ModelView called ProductManager, which contain an empty function just to dimostrate the issue: class Products:ObservableObject{ func loadProduct(){ } } I still got the same errore saying: "ProductManager" can not be found in scope... I did check also the inspector and the target is set correctly...