diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index eeab6d0da1ca657ee271f322b238dc0aacc41e92..fee7ff79e851dcce3b6c60a1f68263d733270c97 100755
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -20,7 +20,7 @@ prepare:
 test_python2:
   stage: test
   script:
-    - conda env update -f environment.yml -n hermesv3_gr python=2.7
+    - conda env update -f environment.yml -n hermesv3_gr python=3.6
     - source activate hermesv3_gr
     - python run_test.py
     # - pip install codacy-coverage --upgrade
diff --git a/hermesv3_bu/hermes.py b/hermesv3_bu/hermes.py
index 2dd8557b27e3cfdf0812ab00c7d267ded91e8c81..b8841bd3d4f181a3eb6b4112e941f6a4ed21ac10 100755
--- a/hermesv3_bu/hermes.py
+++ b/hermesv3_bu/hermes.py
@@ -30,8 +30,10 @@ class Hermes(object):
                                 self.grid)
         self.date_array = [self.arguments.start_date + timedelta(hours=hour) for hour in
                            range(self.arguments.output_timestep_num)]
-        self.logger.write_log('Dates to simulate: {0}'.format(
-            [aux_date.strftime("\n\t%Y/%m/%d, %H:%M:%S") for aux_date in self.date_array]), message_level=3)
+
+        self.logger.write_log('Dates to simulate:', message_level=3)
+        for aux_date in self.date_array:
+            self.logger.write_log('\t{0}'.format(aux_date.strftime("%Y/%m/%d, %H:%M:%S")), message_level=3)
 
         self.sector_manager = SectorManager(
             self.comm, self.logger, self.grid, self.clip, self.date_array, self.arguments)
diff --git a/hermesv3_bu/sectors/traffic_area_sector.py b/hermesv3_bu/sectors/traffic_area_sector.py
index a7cad42f39884f5a23b8c90b2c2f34c6e30685b2..64db3da48fc68439b24dd8e020acd93192e5e2ea 100755
--- a/hermesv3_bu/sectors/traffic_area_sector.py
+++ b/hermesv3_bu/sectors/traffic_area_sector.py
@@ -59,14 +59,14 @@ class TrafficAreaSector(Sector):
             if not os.path.exists(os.path.join(self.auxiliary_dir, 'traffic_area', 'vehicle_by_cell.shp')):
                 self.logger.write_log('\t\tCreating population shapefile.', message_level=3)
                 pop = self.get_clipped_population(
-                    global_path, os.path.join(self.auxiliary_dir, 'traffic_area', 'population.shp'), write_file=True)
+                    global_path, os.path.join(self.auxiliary_dir, 'traffic_area', 'population.shp'), write_file=False)
                 self.logger.write_log('\t\tCreating population shapefile by NUT.', message_level=3)
                 pop = self.make_population_by_nuts(
                     pop, provinces_shapefile, os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_NUT.shp'),
-                    write_file=True)
+                    write_file=False)
                 self.logger.write_log('\t\tCreating population shapefile by NUT and cell.', message_level=3)
                 pop = self.make_population_by_nuts_cell(
-                    pop,  os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_NUT_cell.shp'), write_file=True)
+                    pop,  os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_NUT_cell.shp'), write_file=False)
                 self.logger.write_log('\t\tCreating vehicle shapefile by cell.', message_level=3)
                 veh_cell = self.make_vehicles_by_cell(
                     pop, gasoline_path, pd.read_csv(total_pop_by_prov),
@@ -89,11 +89,11 @@ class TrafficAreaSector(Sector):
             if not os.path.exists(os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_SMALL_cell.shp')):
                 self.logger.write_log('\t\tCreating population shapefile.', message_level=3)
                 pop = self.get_clipped_population(
-                    global_path, os.path.join(self.auxiliary_dir, 'traffic_area', 'population.shp'), write_file=True)
+                    global_path, os.path.join(self.auxiliary_dir, 'traffic_area', 'population.shp'), write_file=False)
                 self.logger.write_log('\t\tCreating population small cities shapefile.', message_level=3)
                 pop = self.make_population_by_nuts(
                     pop, small_cities_shapefile, os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_SMALL.shp'),
-                    write_file=True)
+                    write_file=False)
                 self.logger.write_log('\t\tCreating population small cities shapefile by cell.', message_level=3)
                 pop = self.make_population_by_nuts_cell(
                     pop, os.path.join(self.auxiliary_dir, 'traffic_area', 'pop_SMALL_cell.shp'), write_file=True)