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--- a/Analysis/RivetAnalysis.cc 2024-01-30 23:57:34.065788628 +0100
+++ b/Analysis/RivetAnalysis.cc 2024-01-31 00:00:54.544781058 +0100
@@ -31,7 +31,22 @@
AnalysisHandler::analyze(event, ieve, loop, state);
// Rotate to CMS, extract final state particles and call analyze(particles).
// convert to hepmc
+#ifdef HAVE_HEPMC3
+ std::shared_ptr<HepMC3::GenRunInfo> ri = std::make_shared<HepMC3::GenRunInfo>();
+ std::vector<std::string> w_names;
+ w_names.push_back("Default");
+ for ( map<string,double>::const_iterator w = event->optionalWeights().begin();
+ w != event->optionalWeights().end(); ++w ) {
+ w_names.push_back(w->first);
+ }
+ ri->set_weight_names(w_names);
+#endif
+
HepMC::GenEvent * hepmc = ThePEG::HepMCConverter<HepMC::GenEvent>::convert(*event);
+#ifdef HAVE_HEPMC3
+ hepmc->set_run_info(ri);
+#endif
+
// analyse the event
if(_nevent>1) CurrentGenerator::Redirect stdout(cout);
if ( _rivet ){
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