coin-or / Dip

DIP is a decomposition-based solver framework for mixed integer linear programs.
https://github.com/coin-or/Dip/wiki
Eclipse Public License 1.0
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"Bad" phase update after heuristic #86

Open svigerske opened 5 years ago

svigerske commented 5 years ago

Issue created by migration from Trac.

Original creator: @mosu001

Original creation time: 2011-11-01 06:00:47

While Dip is in Phase I the user heuristic is called and returns a feasible solution. However, as far as I can tell, PhaseIObj is not updated so the solution is determined to be infeasible and problems arise. I used Dippy to build the model and the heuristic solution.

svigerske commented 5 years ago

Attachment altdippyMIP.py by @mosu001 created at 2011-11-01 06:01:42

Dippy script that call Dip and creates problem