gDirectory->Get("electron_Pt") does not work for me

[m.sohail]

To search a specific histogram in a root file, I tried gDirectory->Get(“electron_Pt”) but this does not work? The electron_Pt is exist in that root file but the command is not able to find it. Please suggest.

[Wile_E_Coyote]

gDirectory->ls();

[amadio]

Try also the command-line tool rootls. It’s possible that electron_Pt is a branch in a TTree, so you won’t be able to get it with gDirectory->Get().