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

In My Case it was a result of Model.xcdatamodeld having conflicts when Merged with Remote (Source or Head). Somehow this conflict wasn't detected by GIT and slid through as Conflict Free.

Resolution: Open Model.xcdatamodeld as xml (with textEditor) and search for conflicts (>>>). Fix conflict and Save.