diff --git a/helpers/yearly_from_daily_schedules.py b/helpers/yearly_from_daily_schedules.py
index 9c8431c9..c7c3bac5 100644
--- a/helpers/yearly_from_daily_schedules.py
+++ b/helpers/yearly_from_daily_schedules.py
@@ -32,7 +32,7 @@ class YearlyFromDailySchedules:
 
     values = []
     for month in range(1, 13):
-      for day in range(1, cal._monthlen(self._year, month)+1):
+      for day in range(1, cal.monthlen(self._year, month)+1):
         week_day = cal.weekday(self._year, month, day)
         values.extend(weekly_schedules[week_day])
     yearly_schedule.type = self._daily_schedules[0].type
diff --git a/unittests/test_usage_factory.py b/unittests/test_usage_factory.py
index e3c6b7ba..111e581f 100644
--- a/unittests/test_usage_factory.py
+++ b/unittests/test_usage_factory.py
@@ -7,6 +7,7 @@ from pathlib import Path
 from unittest import TestCase
 
 from imports.geometry_factory import GeometryFactory
+from imports.construction_factory import ConstructionFactory
 from imports.usage_factory import UsageFactory
 from imports.construction_factory import ConstructionFactory
 from imports.geometry.helpers.geometry_helper import GeometryHelper
@@ -29,6 +30,15 @@ class TestUsageFactory(TestCase):
     self.assertIsNotNone(_city, 'city is none')
     return _city
 
+  def test_comnet(self):
+    file = 'pluto_building.gml'
+    city = self._get_citygml(file)
+    for building in city.buildings:
+      building.function = GeometryHelper.pluto_to_function[building.function]
+
+    ConstructionFactory('nrel', city).enrich()
+    UsageFactory('comnet', city).enrich()
+
   def test_city_with_usage(self):
     """
     Enrich the city with the usage information and verify it