[Qucs-help] using BC560 produces a warning

[Alexandros K-K <nom...@gm...>]

hello everyone

using BC560 produces a couple of warnings, namely

WARNING: Unphysical model parameter Nf = 0.9872 in BJT `BC560AP_1'
WARNING: Unphysical model parameter Nr = 0.996 in BJT `BC560AP_1'

even in the most basic example circuits.
What am i doing wrong here?

thanks in advance
Alexandros