“[something copyWithZone:]: unrecognized selector sent to instance” when using Bindings / Core Data

Question

(self asking and self-answering because I spent hours on the web looking for this, and most of the resources all say \"I solved it in the end\" without giving an explanation

Answer 1

As a hint to avoid any kind of problems with the binding one can convert the NSManagedObject into NSDictionary while populating the controllers with:[object dictionaryWithValuesForKeys:[[object entity] attributeKeys]], it is a lot easier to connect and debug :-)

Thanks for the pointer by the way!