[ROOT] : matrix in a Tree

From: paolo maestro (paolo.maestro@pi.infn.it)
Date: Thu Oct 02 2003 - 09:51:37 MEST 

Hi rooters,
I have a  class  Event containing a   float Matrix[20][50];
in the main program I fill a root tree  h1 with an object  Event* event.
When I  type  ina Root session h1->Draw("Matrix[i][j]") the plots are
the ones I expect, but if I try to read h1 with the following macro

Event* event=0;
h1->SetBranchAddress("event",&event);

for(int i=0;i.....)
   {
    h1->GetEntry(i);
    .....
    .....
    event->Clear();
}

a segmentation violation occurs.  That does not happen
with a small size matrix (it seems to work well up to Matrix[20][20]).
Is there something wrong in what I did ?
Is there some size limit  for arrays one can store in a Tree?
Cheers

                Paolo

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