First checkout the Higgs combination code in lxplus.
Instructions are below:
https://twiki.cern.ch/twiki/bin/view/CMS/SWGuideHiggsAnalysisCombinedLimit
Use the latest branch in ROOT6 (CMSSW_7_4_7)
Inside "test" directory, create another folder of anyname.
git clone -b master https://github.com/gourangakole/LimitComputationHtoCS.git