Hi Jan, You can call branch->Fill, but at the same time you must also update the number of entries in the Tree via tree->SetEntries. See http://root.cern.ch/root/htmldoc/TTree.html#TTree:SetEntries Rene Brun Jan CONRAD wrote: > > Hi, > > I have a seemingly simple problem. I have a tree containing two branches > and I will only fill one of them ignoring the other branch. If I use only > branch->fill it doesn't update the tree (tree has zero entries, file > contains no data). > > If I use tree->Fill it seems to try to fill the whole tree. > > So my solution would be to try to use tree->Fill but to force it to ignore > one of the branches. > > Is this possible ? Any other suggestions ? Should the branch->Fill work ? > > Thanks in advance, > > Jan > > -- > > ------------------------------------------------------------ > Jan CONRAD, PH/EP Dpt., CERN, CH-1211 Geneva 23, Switzerland > +41 22 767 0182 (9480) (fax), Office 160-1-0012, > ------------------------------------------------------------
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