Fix gap setting after optimize

Fixed rare case when gurobi returns unbounded model with a worthless solution
coin-or · Mar 24, 2022 · 030d976 · 030d976
1 parent f14bd68
commit 030d976
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/mip/model.py b/mip/model.py
@@ -616,8 +616,11 @@ def optimize(
  )
 
  self._status = self.solver.optimize(relax)
- # has a solution and is a MIP
- if self.num_solutions and self.num_int > 0:
+ # has a solution
+ if self._status in (
+ mip.OptimizationStatus.OPTIMAL,
+ mip.OptimizationStatus.FEASIBLE,
+ ) and self.num_int > 0:
  best = self.objective_value
  lb = self.objective_bound
  if abs(best) <= 1e-10: