Sander Mertens

Thank you, works perfect!

Thank you for your clear answer, despite the mistakes in my post. The constraint finally seems to work!

My apologies, you're right. The additional condition for t can be dropped so that it the constraint must only hold for all j (except 12) and t:

First an multidict is created: proc_combo, costs = {(0, 0, 0): 5, (0, 1, 1): 10, (1, 1, 1): 15, (0, 2, 2): 20, (1, 2, 2): 25, (0, 3, 3): 30, (0, 4, 4): 35, (0, 5, 5): 40, (0, 6, 6): 45, (1, 6, 6): ...

If you don't mind, I have a additional question. As can be seen before, the X variables have four subsets. In my objective function I want to sum all the X variables together, with an exclusion of ...

Thank you!

Thank you for your quick explanation, it solved the problem!