I am trying to work through the Core Data technical project (days 57-59) but have got very confused by the jumping from on thing to another and am wondering if I missing soemthing as I am getting error messages each time the entity is changed. In the tutorial Paul keeps adding different entities but when I add more than one to core data it doesn't recognise the new one and when I write out the fetch request it says 'not found in scope'. I have tried forcing save but I am wondering if you can't actually have two entities in the same core data model or if you have to change something elsewhere. I already had to create a second project after he changed the 'movie' entity to 'wizard' as I could not get that to work at all. Are we supposed to create a new project for each entity or delete the old one? He doesn't mention that we do but clearly I am doing something wrong as it is not working. If anyone could shed any light here, it would be appreciated.

Thanks

At times xcode cannot recognize it immediately, but after rebuild (cmd + B) it starts recognizing.

Thanks for your reply - I have tried but when I press command + b, it says 'failed to build.' I get an error message also in the CoreDataProjectApp file saying 'Generic parameter 'Content' could not be inferred.' As far as I can see, I have done everthing he has and it worked okay for the Wizard entity but this new entity will not be recognised for some reason.

CMD+S to save the CoreData, CMD+shift+K to clean, then CMD+B to build.

Many thanks @Bnerd - it is now working!