check

src/SystemBuilder.cc

@@ -60,6 +60,8 @@ void SystemBuilder::run_gui(){
 }
 
 void SystemBuilder::run_batch(int nEvents, std::string partSpecies, double minEnergy, double maxEnergy){
+    G4String partSpec = (G4String)partSpecies;
+    G4cout << "running with particle species " << partSpec << G4endl;
     actionInitialization->setGeneratorProperties(minEnergy, maxEnergy, (G4String)partSpecies);
     UImanager->ApplyCommand("/run/initialize");
     runManager->BeamOn(nEvents);