Info in <TFileMerger::MergeRecursive>: could not read object for key

ROOT
1

Dear Experts,
I am using the hadd macro to merge some output files in a bash shell

hadd -f nominal/output_5.root nominal/output_5_mc16*.root
The merging fails with the following error:

R__unzip: error -3 in inflate (zlib)

Info in TFileMerger::MergeRecursive: could not read object for key {h_CutFlowUnw, h_CutFlowUnw}; skipping file nominal/output_5_mc16d.root

Error R__unzip_header: error in header. Values: 919c

Info in TFileMerger::MergeRecursive: could not read object for key {h_CutFlowWei, h_CutFlowWei}; skipping file nominal/output_5_mc16d.root

Any idea on what could be causing this issue?
Technical details about the root version and setting follow
_ROOT Version:6.18.04
_Platform:lxplus
_Compiler:-x86_64-centos7-gcc8-opt

Kind Regards,
Valentina

2

The most likely cause is that the file have been corrupted. Can you check if your can read them in the ‘normal’ (what ever that means for you :slight_smile: ) way?

3

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