Hi, I am trying to use TChain to loop the a tree. However, I found that if my root file with the name “XXX.root/XXX.root.2”, the TChain can not correctly read the file. the code is like this. TChain *chain = new TChain(“tree_name”); chain->Add(“XXX.root/XXX.root.2”,0); Then, I got an error mes…

Wile_E_Coyote February 4, 2019, 2:05pm 2

SysError in <TFile::ReadBuffer>: error reading from file General Chat

This is a bug in ROOT 5 and 6. Rename your subdirectory so that its name does not end with “.root” (e.g. into something like “…1_out_root”) or use t->Add("user.....1_out.root/*.root"); (note: it must be “*.root”, it cannot be “*.root*” nor “*root” nor “*root*”).

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Problem with input name of TChain->Add()