cerate cmsenv with specific CMSSW release and go to src area
do "git clone [email protected]:panwarlsweet/grid-pack-GenValidation.git GenValidation/NtupleGenJet"
do "scram b" in src area
change GEN-SIM input file name in test/runAnalyzer.py
do "cmsRun runAnalyzer.py"
it will create a root file with basic GenJet kinematic distribution