This is how it is for the input file I’m trying to read:
root [0]
Attaching file merged_160919_104734.root as _file0...
root [1] .ls
TFile** merged_160919_104734.root
TFile* merged_160919_104734.root
KEY: TH1D hEtaX;1 Eta distribution for X planes
KEY: TH1D hEtaY;1 Eta distribution for Y planes
KEY: TH1D hVAEnergyX_48_0_0;1 Energy for ladder 48 X VA 0 #eta region 0
KEY: TH1D hVAEnergyY_0_0_0;1 Energy for ladder 0 Y VA 0 #eta region 0
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