rhoSimpleFoam BC Error
 

Hi,
I am a pretty new Foamer. I simulated a incompressible Flow with simpleFoam and the folowing BC:

U: Inlet (flowRateInletVelocity 0,008) Outlet (flowRateInletVelocity -0,008) body (noSlip) Model (noSlip)
p: Inlet (zeroGradient) Outlet (fixedValue) body (zeroGradient) Model(zeroGradient)
The Simulation does great! (The Oulet-Velocity is necesary)

Now i woult like zu add Temperature an I use rhoSimpleFoam --> BC:
T: Inlet (fixedValue) Outlet (zeroGradient) body (zeroGradient) Model( fixedValue)

The simulation dont run and i get this Error:

any idea?
Thank you very much!