additions

src/PrimaryGeneratorAction.cc

@@ -83,6 +83,11 @@ void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
 
   auto particleDefinition
     = G4ParticleTable::GetParticleTable()->FindParticle(partSpecies);
+  if(particleDefinition == nullptr){
+    G4cout << "Particle " << partSpecies << " not found" << G4endl;
+    throw std::runtime_error("Particle not found");
+    return;
+  }
   fParticleGun->SetParticleDefinition(particleDefinition);
   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
   fParticleGun->SetParticleEnergy(partEnergy*MeV);

src/SystemBuilder.cc

@@ -60,7 +60,7 @@ void SystemBuilder::run_gui(){
 }
 
 void SystemBuilder::run_batch(int nEvents, std::string partSpecies, double minEnergy, double maxEnergy){
-    actionInitialization->setGeneratorProperties(minEnergy, maxEnergy, partSpecies);
+    actionInitialization->setGeneratorProperties(minEnergy, maxEnergy, (G4String)partSpecies);
     UImanager->ApplyCommand("/run/initialize");
     runManager->BeamOn(nEvents);
 }