How to Empty Caches and Clean All Targets Xcode 4 and later

Question

Jonathan suggest here: Xcode Includes .xib files that have been deleted! that cleaning all targets and empty the caches will fix the problem with Xcode including deleted .xi

Answer 1

When using a "Data Model" , there are options in the inspector to generare classes, for me this was the case as there was already a class with the existing name.

Codegen: solved it for me.