<div dir="ltr">Hey there :)<div><br></div><div>I'm trying to run an analysis with Pythia 8 and Rivet (ALICE_2010_S8624100 in particular) requiring multiple beams, each of which I've stored in a separate .hepmc file. When I hand these over to Rivet (doesn't matter if I use fifo or pre-written, disc based .hepmc), Rivet reads the first file correctly and then complains</div><div><br></div><div><div>Reading events from 'main42_2360_out.hepmc'</div><div>Event beams mismatch: [PROTON, PROTON] @ 2360 GeV vs. first beams [PROTON @ 450 GeV, PROTON @ 450 GeV] @ 900 GeV</div></div><div><br></div><div>I can't find separate instructions on how to use Rivet for an analysis like this other than using multiple output files, so what's going on?</div><div><br></div><div>Thanks</div><div>Eike</div></div>