Insert Managed Object into CoreData from xml?

I see two things wrong in these two lines. First, you're not using the designated initializer for NSManagedObject in your Themes initializer. I know that for two reasons: a) that's exactly what the error message says; b) the initializer can't know what context to use because you haven't created the context at that point.

The designated initializer for NSManagedObjectContext is.

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