Buckling Factor for Variable Load

I know I can use ASE → EIGE to get buckling factor for PLC.

Now I have 2 load cases, G for permenet load, and Q for variable load.
Both load cases act on the structure at the same time.

If I use PLC G, then I get buckling factor for G;
and if I PLC Q, then I get buckling factor for Q;

I want to get buckling load: 1.0 x G + buckling factor x Q, which cause the structure to buckle.

In Midas etc, user can specify which load is a “constant load”, and which load is “variable load” in buckling analysis setting,

so the buckling load = constant load + buckling factor x variable load

How to do it in Sofistik?