Dear Robert,
I have to solve multi-objective problem and i wrote these statements in my run file were
“Cout_Total” is the first objective
“Consommation_carburant” the second objective
option solver gurobiasl;
option gurobi_options ‘relax=1’;
option gurobi_options ‘nonconvex=2 outlev=1 presolve=2 preqlinearize=1 multiobj=1’;
solve;
let Cout_Total.objweight := 0.6;
let Consommation_carburant.objweight := 0.4;
I have had the following syntax error message:
objweight is not an assignable suffix.
context: let >>> Cout_Total.objweight <<< := 0.6;
objweight is not an assignable suffix.
context: let >>> Consommation_carburant.objweight <<< := 0.4;
I am writing to you to help me correct this.
And also I have had the following statement:
“Multi-objectives with quadratic terms are not supported
Gurobi 10.0.0: Feature not supported
Objective = Cout_Total”
So I would also like to ask you how which solver can I use to solve multi-objective problem as I am currently using Gurobi 10.0.00.
Best regards.