[5.28.00a] GetBranch/SetAddress not working for TChains w/ multiple files ?

hi there,

in ROOT 5.28.00(a) it seems that one can do the following:

void MyClass::init_branches(TTree *t)
{
  TBranch *b = t->GetBranch("some_br_name");   if (!b) { panic(); }
  b->SetAddress(&this->m_some_var);
  b->SetStatus(1);
}

that's great b/c it doesn't clutter the class MyClass with all the TBranch* data members.

but it seems it only works for a TTree or TChain with only 1 file. (otherwise, the content of m_some_var is just the default c-tor value.)

so, is the above piece of code meant to be working ? or am I missing some mandatory snippet of code ?
(or should I just bite the bullet and still stick all of these TBranch* data members ?)

-s

-- 
#########################################


# Dr. Sebastien Binet

# Laboratoire de l'Accelerateur Lineaire

# Universite Paris-Sud XI

# Batiment 200

# 91898 Orsay

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