diff --git a/bind/G4Calo.py b/bind/G4Calo.py
index 2b2843d..4174fa1 100644
--- a/bind/G4Calo.py
+++ b/bind/G4Calo.py
@@ -219,6 +219,7 @@ def run_batch(
     with multiprocessing.Pool(nCores) as pool:
         dfs = pool.starmap(_run_mini_batch_silent, [(gd, nevents[i], particleSpec, minEnergy_GeV, maxEnergy_GeV, seed, i) for i in range(nCores)])
 
+    print('simulation finished')
     alldf = pd.concat(dfs)
     alldf.reset_index(drop=True, inplace=True)
     #convert alldf['total_dep_energy'] to numpy array and check if all non-zero entries are unique