HepMC3 event record library
Bug List
Global ReaderAsciiHepMC2::read_event (GenEvent &evt) override

HepMC2 files produced with Pythia8 are known to have wrong information about number of particles in vertex. Hence '<' sign

HepMC2 files produced with Pythia8 are known to have wrong information about number of particles in vertex. Hence '<' sign