Multicore in docker is tt working

[zmarshal]

Just for completeness, I wanted to point out that the solutions of this are discussed in

Ubunbtu to run C++ and root

I use the version you give for the 13 TeV Tutorial for Education Ubuntu 18.4.3 Root 6.18 and ATLAS-Open-Data-ubuntu-v4 from Zenodo This works well with the 13 TeV data This does not work with the 13 TeV 2025 beta Tutorial you give. It seems that it is a problem of root version and (or) C++ compiler. What can i do?