I am trying to merge root files with the same internal structure using hadd.
hadd -f BT.root Tree*.root
However when this runs all that happens is that all my files are attached
Attaching file Tree1.root as _file1
My output file is not overwritten.
ROOT Version: 6.2
Platform: Windows 10
It works for me:
% ls hhh*.root
hhh1.root hhh2.root hhh3.root
% hadd HHH.root hhh*.root
hadd Target file: HHH.root
hadd compression setting for all output: 1
hadd Source file 1: hhh1.root
hadd Source file 2: hhh2.root
hadd Source file 3: hhh3.root
hadd Target path: HHH.root:/
hadd Target path: HHH.root:/subdir
% ls -l HHH.root hhh*.root
-rw-r--r-- 1 couet staff 1216412 Aug 24 08:59 HHH.root
-rw-r--r-- 1 couet staff 416070 Aug 24 08:58 hhh1.root
-rw-r--r-- 1 couet staff 416070 Aug 24 08:58 hhh2.root
-rw-r--r-- 1 couet staff 416070 Aug 24 08:58 hhh3.root
Hi @JoshPBR ,
and welcome to the ROOT forum!
I cannot reproduce the problem either, I can use
hadd -f to overwrite an existing file.
Is your ROOT version really 6.2? If so, you might want to update to a newer version.
Otherwise we’ll need a way to reproduce the issue, maybe you could try to reproduce the problem on LXPLUS or in a Docker container.
This would be part of the expected output if you had written something like
root -f BT.root Tree*.root
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