AddFriend

I an using root 4.04/02b. I am seeing a strange problem when I use AddFriend and Draw method. This is what I am doing:

TFile f_mc_pc_us = new TFile("/neutrino_pc_us.root",“r”);
TTree pc_nu_us = (TTree)f_mc_pc_us->Get(“pc_nu_us”);
TFile
f_mod_pc_us=newTFile(“mod_neutrino_pc_us.root”,“r”);
TH1F *wt_mc_pc_us = new TH1F(“wt_mc_pc_us”,“stopping upstream”,20,0,5);
pc_nu_us->AddFriend(“rwt_pc_nu_us”,f_mod_pc_us);
pc_nu_us->Draw(“evt_rewt>>wt_mc_pc_us”);

The problem is I can see the plot but the histogram is not getting filled. After this if I do:

wt_mc_pc_us->Draw();

I see an empty histogram. I tried the Fill() method and it works fine.

             -thanks Debdatta.

Hi,

Can you send the shortest running example that shows the problems?

Thanks,
Philippe.

Hi,
thanks for you reply. The problem seems to have gone away now, things are working fine.
I apologize for the trouble.