The Utilistion amout is zero

Hi, I don’t know why there are no amounts for surface utilisation, as you see in File, was applied a big amount of load. But no utilization amount for surface in karamba. Please give me some advice. The utilization is zero. That means the surface is not participating to empower the beam elements?
Utilisation.gh (68.4 KB)

Hi, your yield strength in the material seems to be very high. You should check this as this affects the utilisation value.