fix temp/berendsen

Hi Dear all
I want to simulate a nano-channel with two walls in the Z direction and fix two walls at a constant temperature using fix temp/berendsen,
But i encountered this error: computed temperature for fix temp/berendsen can not be 0.0
What is the reason for this error?
and what is the ‘Tdamp’ in the ’ fix ID group-ID temp/berendsen Tstart Tstop Tdamp’ ?

Hi Dear all
I want to simulate a nano-channel with two walls in the Z direction and fix
two walls at a constant temperature using fix temp/berendsen,
But i encountered this error: computed temperature for fix temp/berendsen
can not be 0.0
What is the reason for this error?

if you look up how ​fix temp/berendsen works, you will see that it operates
by rescaling the velocitites. however​, you cannot find a scaling factor,
that changes 0K to a finite temperature, hence the error.

and what is the 'Tdamp' in the ' fix ID group-ID temp/berendsen Tstart
Tstop Tdamp' ?

​please read the documentation (and if needed the paper describing the
berendsen thermostat).

axel.​