Thomas Opfer

Undefined references mean that you forgot the library in the compiler command. I am not sure which library is missing, but I guess it is libgurobi_c++.a, so try adding -lgurobi_c++ to the end of yo...

As far as I know, you need an academic site license for this. (cf. https://www.gurobi.com/academia/academic-program-and-licenses/ ) From my experience, I would not expect too much from distributed ...

Can you post an .lp or .mps file of your model? One thing seems strange: In your first constraint, you interate t over range(1-w_max, H) and in the second constraint, you iterate t over trans_per(i...

You can obtain the order of the variables in the current basis, see here: https://www.gurobi.com/documentation/9.0/refman/c_getbasishead.html 

Maybe, this is due to numerical trouble. Can you tell us how large M is?

I think you need constraints that state that not more than one presentation may be in the same room at the same time. Otherwise, that would be perfectly ok.

You could play around with the MIPFocus parameter: https://www.gurobi.com/documentation/9.0/refman/mipfocus.html 

Yes, you can do this. Just have a look at the following links: https://www.gurobi.com/documentation/9.0/refman/vbasis.html  https://www.gurobi.com/documentation/9.0/refman/cbasis.html  https://www....

1. The returned vector is the Farkas Dual of the problem where it is returned from. (Obviously.) 2./3. Do you have variables with non-trivial bounds? If yes, please read this (including the comment...

I would hope that the preprocessor is able to detect two corresponding constraints and make a ranged constraint out of them. From a linear point of view, if I knew there is a ranged constraint, I w...