For the first time in two years I have updated the Highs interface in Schedule Nurse. Two years ago there was an implementation of the trumpet OsiHighsSolverInterface, but in version 1.9.0 it was gone. There was no other choice, so I wrote it myself.
The MIP solver interface in Highs has also been updated and it is now possible to have a callback when the value of the objective function changes. This means that even if you abort the solution in the middle, you can still keep the best solution up to that point.
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