diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index be8f096..fee48b1 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -90,6 +90,7 @@ def main(catalog_file, mc_file, pdf_file, m_file, m_select, mag_label, mc, m_max
     from matplotlib.contour import ContourSet
     import xml.etree.ElementTree as ET
     import json
+    import multiprocessing as mp
 
     logger = getDefaultLogger('igfash')
 
@@ -478,8 +479,9 @@ verbose: {verbose}")
         use_pp = True
 
         if use_pp:         # use dask parallel computing
-            pbar = ProgressBar()
-            pbar.register()
+            mp.set_start_method("fork", force=True)
+            #pbar = ProgressBar()
+            #pbar.register()
             # iter = range(0,len(distances))
             iter = indices
             iml_grid_raw = []  # raw ground motion grids