Hi Peter,
Have you seen any other errors or warnings?
At first, try to clean project.
I tried it and I'm able to build AN5201 sw.
I'm using the newest version CodeWarrior 11.1.
I imported the project by File -> Import -> General -> Existing Project into Workspace
Could you, please, check the path to that file? Can you find the file in your file system?
C:/Freescale/CW MCU v10.6/MCU/S12lisa_Tools/Build_Tools/mwccs12lisa
Best regards,
Diana