Forum Discussion
Benders decomposition failure (Java API)
I'm trying to implement Benders decomposition on a simple example (MIP master problem, LP subproblem) using a combination of a `PreIntsolCallback` (which ignores node optima but rejects heuristic sol...
Thanks Daniel. I was assuming that the optnode callback was only invoked for integral solutions. Also, I had tried calling addCut() from the preintsol callback earlier, without success, due to another error. I mistakenly thought that, since I was rejecting the proposed incumbent, I should set pReject.value = 1 in the preintsol callback. Setting it to 0 after adding the cut works.
