Why critical factor doesn't match critical force

[daniel_2025]

What is interesting, when I'm increasing nodal force it's better, and better. When nodal force is 100kN instead of 1 kN the results are close to truth....

[daniel_2025]

I tried RF-Stability in RFEM 5.25.02 and something is wrong with it or I'm making a mistake somewhere. I have two examples:
1. Pinned column L =...