CoreData issue: -[NSManagedObject setValue:]: unrecognized selector sent to instance

Question

I just started with CoreData yesterday, and I\'m going crazy :( I created a project that uses CoreData (ticked the box -use CoreData). Created the entities, and then created the

Answer 1

take the following steps

1) created a new version of the Core Data Model via Xcode.

2) Fix the relationship (added a new relationship between the two. )

Creating Managed Object Relationships

3) re-created the NSManagedObject subclass