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Plotting fails in ROOT 6.24/02 with "only one instance of TApplication allowed" #8

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katilp opened this issue Aug 10, 2021 · 0 comments

katilp commented Aug 10, 2021 •

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In ROOT 6.24/02, the plotting part fails with:

Error in TApplication::TApplication: only one instance of TApplication allowed

In ROOT 6.22/08 it works, as indicated in the README.

This error is mentioned in

https://root-forum.cern.ch/t/tapplication/21393
https://root-forum.cern.ch/t/root-5-34-error-error-in-tapplication-tapplication-only-one-instance-of-tapplication-allowed/33723
These are for older root versions so not necessarily useful here.

Tested in root containers

rootproject/root:latest -> 6.24.02-ubuntu20.04
rootproject/root:6.22.08-ubuntu20.04

with

root -b -l <<EOF
.L RochesterCorrections/muresolution.cc++
.L RochesterCorrections/rochcor2012wasym.cc++
.L RochesterCorrections/Test/Analysis.C+
Analysis pf
pf.main()
.L RochesterCorrections/Test/Plot.C+
main()
.q
EOF

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