Hi, Unfortunately, you do not indicate which version of ROOT and OS. I cannot reproduce this problem with the current version 3.05/03 Rene Brun On Mon, 21 Apr 2003, dwkim wrote: > Hello! > My name is dongwook kim. > I tried merge the root files which include the histograms and a tree(tree name=JetMet, Brach name=Event, subBranch names=TObject, EventHeader, .....) as follow as below, > > { > gSystem.Load($ROOTSYS/test/libEvent.so"); > Event *event = new Event(); > TChain ch("JetMet"); > ch.SetBranchAddress("event",&event); > ch.Add("wh_bbmn_0_0_0.root"); > ch.Add("wh_bbmn_250_0_0.root"); > ch.Merge("test_merge.root"); > } > > Then I met the error message as below, > Error in <TObjArray:At>:index -16662 out of bounds (size:13, this: 0x087e5b58) > Error in <TObjArray::AddAt>: out of bounds at 16662 in 87e5b58 > *** Break *** segmentation violation > Generating stact trace ... > ......... > > May I know what I had miss for the merging root files? > Above error is happen with example files(event.root, event40.root, event50.root, ...), too. > > In my best regards! > KDW
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