diff --git a/src/seismic_hazard_forecasting.py b/src/seismic_hazard_forecasting.py
index e1fa212..3651871 100644
--- a/src/seismic_hazard_forecasting.py
+++ b/src/seismic_hazard_forecasting.py
@@ -590,7 +590,7 @@ verbose: {verbose}")
         torder_min = 0
         torder_max = 1
         
-        time, mag_dummy, lat_dummy, lon_dummy, depth_dummy = read_mat_cat(catalog_file, output_datenum=True)
+        time, mag_data, lat_dummy, lon_dummy, depth_dummy = read_mat_cat(catalog_file, output_datenum=True)
 
         datenum_data = time  # REMEMBER THE DECIMAL DENOTES DAYS