Forecastwrapper can't get past 19-04-2017

[saroele]

---

ValueError Traceback (most recent call last)
in ()
13 weather_data = weather.days(irradiances=irradiances,
14 wind_orients=orientations,
---> 15 heating_base_temperatures=[0, 6, 8, 10, 12, 14, 16, 18]).dropna(axis=1)
16 weather_data.drop(['icon', 'summary', 'moonPhase', 'windBearing', 'temperatureMaxTime', 'temperatureMinTime',
17 'apparentTemperatureMaxTime', 'apparentTemperatureMinTime', 'uvIndexTime',

/usr/local/opengrid/opengrid/library/forecastwrapper.py in days(self, heating_base_temperatures, cooling_base_temperatures, irradiances, wind_orients)
189 hourly_frame = self.hours(irradiances=irradiances,
190 no_truncate=True,
--> 191 wind_orients=wind_orients)
192 temperature = hourly_frame.temperature.resample('d').mean()
193 ghi = hourly_frame.GlobalHorizontalIrradiance.dropna().resample('d').sum()

/usr/local/opengrid/opengrid/library/forecastwrapper.py in hours(self, irradiances, no_truncate, wind_orients)
238 pandas.DataFrame
239 """
--> 240 day_list = [self._forecast_to_hour_series(forecast) for forecast in self.forecasts]
241 frame = pd.concat(day_list)
242 frame = self._fix_index(frame)

/usr/local/opengrid/opengrid/library/forecastwrapper.py in (.0)
238 pandas.DataFrame
239 """
--> 240 day_list = [self._forecast_to_hour_series(forecast) for forecast in self.forecasts]
241 frame = pd.concat(day_list)
242 frame = self._fix_index(frame)

/usr/local/opengrid/opengrid/library/forecastwrapper.py in _forecast_to_hour_series(self, forecast)
339
340 hour_list = [pd.Series(self._flatten_solar(hour.d)) for hour in forecast.hourly().data]
--> 341 frame = pd.concat(hour_list, axis=1).T
342 frame.temperature = frame.temperature.astype(float)
343 return frame

/usr/local/lib/python3.5/dist-packages/pandas/tools/merge.py in concat(objs, axis, join, join_axes, ignore_index, keys, levels, names, verify_integrity, copy)
1449 keys=keys, levels=levels, names=names,
1450 verify_integrity=verify_integrity,
-> 1451 copy=copy)
1452 return op.get_result()
1453

/usr/local/lib/python3.5/dist-packages/pandas/tools/merge.py in init(self, objs, axis, join, join_axes, keys, levels, names, ignore_index, verify_integrity, copy)
1482
1483 if len(objs) == 0:
-> 1484 raise ValueError('No objects to concatenate')
1485
1486 if keys is None:

ValueError: No objects to concatenate

[JrtPec]

I can't seem to replicate this problem.