Too high displacement in slab with karamba?


We are trying to optimise pillar placement and slab height using karamba. When trying to verify the results with commercial FEM software such as robot, we continuously get a 10*higher displacement in karamba.
Does anyone know why? It’s very suspicious that it’s by a factor of 10.

Properties in Karamba and Robot
10x10m slab/pillar system
Gravity load
-10kN mesh load

Prototype - (33.1 KB)