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How to call HiGHS solver from python PuLP MIP?

PuLP has an API for HiGHS but that version is not sent to pip yet. For the time being, you should pip install PuLP from Github. See the command taken from their readme below. (ps. You might need to ...
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Circuit constraint leading to infeasibility if there are 0 jobs producable one a machine

you need to add a self arc 0 -> 0 with a Boolean variable indicating if the circuit is empty. For for all tasks, add the implication (circuit is empty => task is not performed). ...

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