Skip if unknown

hub/exports/building_energy/insel/insel_monthly_energy_balance.py

@@ -36,6 +36,9 @@ class InselMonthlyEnergyBalance(Insel):
       file_name_out = building.name + '.out'
       output_path = Path(self._path / file_name_out).resolve()
       if building.internal_zones is not None:
+        for internal_zone in building.internal_zones:
+          if internal_zone.thermal_zones is None:
+            break
           self._contents.append(
             self.generate_meb_template(building, output_path, self._radiation_calculation_method,self._weather_format)
           )