diff --git a/scenario/run.py b/scenario/run.py
index b6e400e..3dde7c1 100644
--- a/scenario/run.py
+++ b/scenario/run.py
@@ -65,6 +65,6 @@
         stats_result = launch_parallel_byvariant(params, env_dic, scenario_variant_dic[params[scenario_id_key]],
                                                  params[ncpu_key])
     else:
-        sys.exit(0)
+        raise KeyError("Unknown scenario")
     print("It took : %.2f seconds" % (time.time() - t_start))
     chose_draw_plot(params[draw_graph_key], stats_result, params[show_plot_key])
diff --git a/simulator/helper/parser.py b/simulator/helper/parser.py
index 0087fc4..17c7eaf 100644
--- a/simulator/helper/parser.py
+++ b/simulator/helper/parser.py
@@ -39,7 +39,7 @@ def get_parser():
     parser.add_argument('--death-bounds', type=int, nargs=2, help='Death bounds', dest=death_bounds_key)
     parser.add_argument('--immunity-bounds', type=int, nargs=2, help='Immunity bounds', dest=immunity_bounds_key)
 
-    parser.add_argument('--nbeds-icu', type=int, help='Number of ICU beds per thousand population',
+    parser.add_argument('--nbeds-icu', type=float, help='Number of ICU beds per thousand population',
                         dest=icu_bed_per_thousand_individual_key)
 
     parser.add_argument('--scenario-id', "--sce", type=int, help='Immunity bounds', dest=scenario_id_key)
diff --git a/simulator/helper/plot.py b/simulator/helper/plot.py
index 5c05a81..6c195c8 100644
--- a/simulator/helper/plot.py
+++ b/simulator/helper/plot.py
@@ -50,7 +50,6 @@ def draw_new_daily_cases(stats_arg, show_plot, x_tick=10):
 def draw_meta_simulation(death_stat_arg, show_plot):
     fig, ax = plt.subplots(figsize=(15, 10))
     set_ax_meta_simulation(ax, death_stat_arg)
-    print("ok")
     if show_plot:
         plt.show()
     else: