Hi every one

I am trying to manipulate variables inside a TChain but something goes wrong.

First of all I creat three Tchain, t , t2 and t3 with the same number of entries in this way:

```
TChain t("T");
TChain t2("som");
TChain t3("sn");
t.Add("ntp-480.root");
t.Add("ntp-481.root");
t.Add("ntp-482.root");
t2.Add("som-480.root");
t2.Add("som-481.root");
t2.Add("som-482.root");
t3..Add("som-480-sn.root");
t3.Add("som-481-sn.root");
t3.Add("som-482-sn.root");
then I add t2 and t3 as friends to t.
t.AddFriend("som");
t.AddFriend("sn");
at this point everything works. If a use the Draw() functions everything is correct. In order to manipulate variables inside t, I use TLeafs:
TLeaf *leaf1 = t.GetLeaf("var1);
TLeaf *leaf2 = t.GetLeaf("var2");
TLeaf *leaf3 = t.GetLeaf("var3");
```

then with the iteration:

```
for(i=0;i<t>GetBranch()->GetEntry(i);
leaf2->GetBranch()->GetEntry(i);
leaf3->GetBranch()->GetEntry(i);
cout<<leaf1>GetValue()<<" "<<leaf2>GetValue()<<" "<<leaf3>GetValue()<<" "<<leaf4>GetValue()<<endl;
```

}

```
it doesn't work! It seems that it considers just the entries from the last file added and the others are messed up...
Am I doing something wrong? Any suggestions?
Thanks,
Marco.
```