[managedObjectContext save:&error]

Without saving everything works just fine (though it doesn’t restore data when I restart, obviously). Whenever I try and save, though, I get the following error.

This NSPersistentStoreCoordinator has no persistent stores.  It cannot perform a save operation.

After finally looking in what turned out to be a pretty obvious place, the declaration of the Persistent Store Coordinator in the App Delegate, the default code generated by XCode doesn’t do any error handling. Here’s what I replace it with:

if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:nil error:&error]) {
        if ([error code] == NSPersistentStoreIncompatibleVersionHashError)
            NSLog(@"Persistent Store Incompatible Version error. Please check %@", storeUrl);
        else {
            NSLog([error description]);
        }
    }