Thanks heaps Dave and all contributors here who saved me much agony!

I had defined my ViewController with an @Class declaration in the AppDelegate.h file, but I had not instantiated it. I was also missing the #import statement for my ViewController.h file at the beginning of my AppDelegate.m file.

So, when I tried to reference the ViewController.managedObjectContext as you described, the controller threw an error because it didn’t know anything about it until I instantiated the class and imported its header file.

Was a tough bug to find but I think I’m good to go now, at least I’m compiling cleanly, we’ll see how it goes once I start calling on objects.

Thanks again ;o)

Those errors are referring to the managedObjectContext member of your View Controller; and I have two ideas:

1. Make sure that @synthesize managedObjectContext is in your ViewController.m file. This is the call that creates the setter methods, and may have been missed.

2. Make sure that when you defined managedObjectContext in the ViewController.h with @property that it wasn’t defined with a “readonly” attribute. I mention this because the object in AppDelegate IS defined as readonly, so there may be confusion there.

Hope one of those helps!

As you recommended, I placed the line

ViewController.managedObjectContext = self.managedObjectContext;

in the ApplicationDidFinishLaunching method of my Delegate, but I get the following error:

“Accessing unknown ‘setManagedObjectContext:’ class method”
and
Object cannot be set – either readonly property or no setter found

If you’ve any idea what is likely to cause this I’d be very grateful for your help, thanks