Use CMSSW_9_2_3 or CMSSW_9_3_0_pre2 to run on the latest PbPb MB MC sample. Forest setup git cms-merge-topic -u CmsHI:forest_CMSSW_9_2_3 Bfinder setup git clone -b Dfinder_9XX https://github.com/taweiXcms/Bfinder.git