hello again -
When I make a TChain out of several files, I would like to
store the chain configuration in a root file rather than
in a macro. Thus, I tried to write out the chain itself to
a root file. However, when i read it back from file i can't
seem to get the tree back:
i get all of my files:
root [4] TrgTree->ls()
OBJ: TChainElement TrgTree $TRGTREE/TrgTree_003432s000.root : 0
OBJ: TChainElement TrgTree $TRGTREE/TrgTree_003432s001.root : 0
OBJ: TChainElement TrgTree $TRGTREE/TrgTree_003433s000.root : 0
...
(NB, the environmental variable TRGTREE is defined already). However
I can't get the tree out:
root [5] TrgTree->GetTree()
(class TTree*)0x0
root [6] TrgTree.Draw("Run")
*** Break *** segmentation violation
Root >
Is there a trick to telling the chain to re-initialize itself
with the tree?
- Peter
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Dr. Peter A. Steinberg Brookhaven National Laboratory
Assistant Scientist Bldg 555, Upton NY, 11973
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Office: 631-344-4390 mailto:Peter.Steinberg@bnl.gov
Mobile: 917-549-3094 http://www.rhic.bnl.gov/~steinber
--> E-mail my cell phone (100 chars max): steinber@steinberg.chm.bnl.gov <--
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