Hm, i made a openhab restart, now i got this warning:
2018-09-04 15:46:24.074 [WARN ] [rthome.model.script.actions.BusEvent] - Cannot convert 'DWD_Pollen_last_' to a state type which item 'PollenLastUpdateDateTime' accepts: [DateTimeType, UnDefType].
Is openhab not recognizing the whole item-name? it is missing “update”.
2018-09-10 10:16:26.367 [WARN ] [rthome.model.script.actions.BusEvent] - Cannot convert '2018-09-09 11:00' to a state type which item 'PollenLastUpdateDateTime' accepts: [DateTimeType, UnDefType].