Print a helpful error message if we are going to fail
Print a helpful error message if we are going to fail

Change-Id: I0685c9d2d857a9e994c616acb6d7ce106c7a7dad

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core