Question:
Why is it not possible to use result combinations in RF‑STABILITY? It is possible in RSBUCK.
Answer:
While the existing axial force in members is used for the eigenvalue analysis in RSBUCK, the external load is increased until failure for the stability analysis in RF‑STABILITY. Thus, in contrast to RSBUCK, no linear eigenvalue analysis is provided and you can only use load cases and load combinations; see the image.