Alexandre Touzet

Thanks to your message I found the problem!  I was creating the model with: m = gp.Model("multi_objective_model") And not: m = gp.Model("multi_objective_model",env=env) Thank you!

Hello, if my post isn't in the proper section please tell me, or transfer it if possible... I really don't know what is wrong with my code as one piece of equipment shouldn't be able two times at ...

Thanks to your advice, I think I found where I was incorrect. Thank you a lot!

Thank you!! It was that indeed. I have modified it as you proposed but I have other errors in the constraints that I don't know how to fix. Sorry that those are be simple questions, I am new to usi...