Mario Ruthmair

Hi Mian, Could it be that the date and time on your machine is not synchronized?Do you already have created a license file in the Gurobi Portal? Best regards,Mario

I just want to add that you are using an old Gurobi version. The latest one is 10.0.1 that potentially deals in a better way with numerically challenging models.

Hi, Why isn't SoC[0,0]+SoC[1,0] = 0.1 when it seems like SoC[0,1] was successfully assigned in initial value of 0.1 in the model? You set SoC[0,0] = 0.1.Then, you set SoC[0,0] = SoC[1,0]. This im...

Hi Kaushik, If you want to find out why some model is infeasible, here is an article on that topic. However, your log output reveals some numerical issues with your model. Here are some general gui...

This is just some way to pass variables or other values to the callback function if you want to use them there, since the callback method just gets the model as parameter. You could also access you...

What exactly do you have in mind? The TSP example or this more basic callback example show you how to do it technically. The rest, i.e., which cuts to add and how to identify violated cuts, is spec...

Hi Israel, PoolSearchMode=2 with PoolSolutions=10 implies that you get the 10 best solutions. But there could be multiple solutions with the same objective value, just differing in the variable val...

Hi Giorgos, As I told you in the beginning, solving VRPs with models of the type you are using and 100 customers is extremely challenging. This is independent of the solver you are using.You need t...

Hi Florian, Ok, this is interesting and might be different to the previous cases. Could you create a minimal reproducible example that we could run on our side?

As you should clearly see, you are using the same variable name for all variables. This of course is not very helpful for debugging. Please name your variables reasonably, then the IIS might make m...