I clicked on the blue xcode project name in the TopLeft of the Project Navigator, and changed the name from "A" to "B", and now I'm getting an e-rror called :
ObjectiveChipmunk - 1 issue
cpSpaceQuery.c
! Lexical or Preprocessor Issue 'chipmunk/chipmunk_private.h' file not found
Please give some help and I will love you for this.