Code compiles against root 6.24 in our production environment... with the following additional modules.

setup 64bits
starver SL23x config/v0.3.0-rhel7-root6.24.06
module load geant4-10.4.0
module load geant4-data-10.4.0
module load geant4-vmc-4-0-p3-root-6.24.06
module load clhep-2.4.5.1
setenv STAR .
cons