Problem with input name of TChain->Add()

[ralfbrian]

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 message.
SysError in TFile::ReadBuffer: error reading from file XXX.root (Is a directory)
Error in TFile::Init: XXX.root failed to read the file type data.

I think the name was not correctly parsed in the Add().

Since I would like to keep the name,
Is there any option I can use to directly put the name in the Add()?

Thanks,

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_ROOT Version: 6.12/06
Platform: Not Provided
Compiler: Not Provided

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[Wile_E_Coyote]

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

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*”).

[ralfbrian]

I see. Thanks. It can be solved by just changing the newer version.