diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index 56922d4..ffd6490 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -16,7 +16,7 @@ from openquake.hazardlib.site import Site, SiteCollection
 from openquake.hazardlib.contexts import ContextMaker
 from openquake.hazardlib.valid import gsim
 from openquake.hazardlib.imt import PGA
-
+import sys
 
 def my_trivial_task(x):
     """
@@ -26,7 +26,7 @@ def my_trivial_task(x):
 
 def compute_IMT_exceedance(rx_lat, rx_lon, r, fr, p, lambdas, D, percentages_D, magnitudes, magnitude_pdf, magnitude_cdf, model, imt='PGA', IMT_min=0.01, IMT_max=2.0, rx_label=None, rtol=0.1, use_cython=False, **kwargs):
     
-    return 0
+    return None
 
     n_events = len(r)
         
@@ -683,6 +683,9 @@ verbose: {verbose}")
             logger.error(msg)
             raise Exception(msg)
 
+        logger.info("Test3 run finished")
+        sys.exit()
+
         # create list of one empty list for each imt
         iml_grid = [[] for _ in range(len(products))]  # final ground motion grids
         iml_grid_prep = iml_grid.copy()  # temp ground motion grids