SOLVED : Weather bindings Wunderground - MinMax is empty

Hi,
I configured OpenHab to get weather data from Wunderground´s API - all works fine except value of MinMax

2016-10-03 14:22:16.210 [INFO ] [runtime.busevents ] - Temp_Dewpoint_F state updated to 9.00
2016-10-03 14:22:16.212 [INFO ] [runtime.busevents ] - Temp_MinMax_F state updated to -/-
2016-10-03 14:22:16.214 [INFO ] [runtime.busevents ] - Temperature state updated to 12.60
2016-10-03 14:22:16.216 [INFO ] [runtime.busevents ] - UV_Index state updated to 1

Item config :
String Temp_MinMax_F “Min/Max [%s °C]” {weather=“locationId=home, type=temperature, property=minMax”}

Sitemap :
Text item=Temp_MinMax_F

Openhab.cfg :
weather:apikey.Wunderground=305908c6…my real key
weather:location.home.latitude=49.7477831
weather:location.home.longitude=13.3783489
weather:location.home.provider=Wunderground
weather:location.home.language=en
weather:location.home.updateInterval=120
weather:location.home.name=home

The minimum and maximum channels need a forecast property, for the current min/max that forecast should be set to zero, and it should show up:

String Temp_MinMax_F "Min/Max [%s °C]" {weather="locationId=home, forecast=0, type=temperature, property=minMax"}

yes, works ! Super thanks