I have to read a branch form a file, which has been written as a simple object containing scalar members:

```
******************************************************************************
*Tree :Data : Data *
*Entries : 50000 : Total = 34020559 bytes File Size = 13110598 *
* : : Tree compression factor = 2.59 *
******************************************************************************
*Branch :Results *
*Entries : 50000 : BranchElement (see below) *
*............................................................................*
*Br 0 :TObject : BASE *
*Entries : 50000 : Total Size= 701836 bytes File Size = 75677 *
*Baskets : 15 : Basket Size= 64000 bytes Compression= 9.27 *
*............................................................................*
*Br 1 :Nparticles : Int_t *
*Entries : 50000 : Total Size= 200806 bytes File Size = 1421 *
*Baskets : 4 : Basket Size= 64000 bytes Compression= 140.96 *
*............................................................................*
```

Is it possible in the structure above to read only NParticles? I don’t have the original definition of the Results class, I would have to rewrite the definition starting from the printout, then generate the dictionary etc. and I would like to avoid this overhead since I only need to read a few leaves. Is this possible and eventually how can I do it? I tried with:

```
root [1] int Nparticles = -1
root [2] Data->GetBranch("Nparticles")->SetAddress(&Nparticles)
root [3] Data->GetBranch("Nparticles")->GetEntry(0)
(Int_t)4
root [4] Nparticles
(int)(-1)
```

which does not work since Nparticles is 1 for the first entry:

```
root [5] Data->Scan("Nparticles")
************************
* Row * Nparticle *
************************
* 0 * 1 *
```

Thanks for the help.