[SOLVED] Moving to openHab2: sendCommand / strange error message / "Ambiguous feature call."


I try to move to openhab 2, but get a lot of errors in the rules.

sendCommand(Lights_Hue_2_Color, Hue_Color_1)

Lights_Hue_2_Color is the Color Item of a Hue
Hue_Color_1 is a variable globally defined.

var HSBType Hue_Color_1 = new HSBType(new DecimalType(0),new PercentType(55),new PercentType(60))

I get the following error message:

Ambiguous feature call.
The methods
	sendCommand(Item, Number)
   in BusEvent and
	sendCommand(Item, Command) in BusEvent

What is wrong?
What do I have to change?

Thank you very much in advance!

I used the designer with version 0.7.0 which threw the errors. There were no errors while executing.