I configured PYTHIA 8.3.06 with ROOT 6.24/02. I was testing the example main92.cc, for the creation of Ttrees storing pythia events. I had modified nothing, I just run:
./main92 > main92.out
The line "T->Branch(“event”,&event); in main92.cc causes the following error to occur:
Error in TStreamerInfo::Build: Pythia8::Event: Pythia8::ParticleData* has no streamer or dictionary, data member particleDataPtr will not be saved
Error in TStreamerInfo::Build: The class “Pythia8::ParticleData” is interpreted and for its data member “pdt” we do not have a dictionary for the collection “map<int,Pythia8::ParticleDataEntry>”. Because of this, we will not be able to read or write this data member.
etc… (other messages of the same kind with other pythia classes and objects)
If needed, I’m working on ubuntu 20.04 and both the pythia8306 and root directories are in home.