Ariel W

Thanks Bot, for your detailed explanation, I got the principle behind this!

Thanks! But still a little bit question: Does Gurobi continue the downward branching iterative calculation on the basis of this input solution or anything else?

Thanks for your careful reply,Soares. I will find the way for optimizing my model based on your advice.

Thanks Soares! I got what the meaning of this, but when i use the "model.relax()" in my program, it seems to ignore almost all constraints as my constraints are seemly all related to binary variabl...

Dear Sir, Thanks for your reply. I still have some questions below, which hope for your gentle advises. Q1: In my model, trips need to be all assigened. How this situation will be solved? Q2: And h...

Sorry, Riley. Waste your time. When I just revisited my code, I found typo. It can work with two similar index. Thank you!

Difinitely! The values of V,S,F are the same as above. V = range(1,3) F = range(1,3) S = range(1,4) The full error message is as follow, the definition of sth referred to your answer about 'product...

And how can i continue calling sth as an auxiliary  variable in another constraint, it seems to be wrong as well, which also outputs"KeyError: 'Duplicate keys in Model.addVars()'"?

Hi, Riley: I'm sorry to bother you, I met problems again. when i want to introduce another auxiliary variable rth[v,i,j,m]for the multiplication of r[v,j] and (1-th[v,i,m]) variables, i try the str...

Thanks, i will try to figure out.