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

[Wile_E_Coyote]

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*”).

TChain does not recognize files with extension ".root.N"

Hi, I noticed a potential harmful behaviour of ROOT6. I have a number of files in a directory called ntuples_data/mydataset.root . Most of the files in the folder mydataset.root have in turn extension .root, but some of them have extension e.g. .root.N (if the attempt N-1 to create them on the grid failed). I can’t change this naming convention. When adding file paths to a TChain, I noticed that in the latter case ROOT reports the following error SysError in TFile::ReadBuffer: error reading f…