Could not determine generated file paths for CoreData code generation

Question

While building my project for different target I am getting this error:

Could not determine generated file paths for Core Data code generation: Er

Answer 1

If you are using NSPersistentContainer, it is available from iOS 10+. You need to change the Target > General > Deployment Info > Deployment Target to 10.0+.

Then, Product > Clean & Build. It worked.