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[KNITRO] Remove iteration count for MIP #3802

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[KNITRO] Remove iteration count for MIP #3802

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8f3a24a
Add MIP iteration count handling in KnitroSolverBase
eminyouskn Dec 16, 2025
d825fdd
Merge branch 'main' into knitro-noitercount-for-mip
eminyouskn Dec 16, 2025
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11 changes: 10 additions & 1 deletion pyomo/contrib/solver/solvers/knitro/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -140,7 +140,10 @@ def _postsolve(self, config: KnitroConfig, timer: HierarchicalTimer) -> Results:
results.solution_status = self._get_solution_status(status)
results.termination_condition = self._get_termination_condition(status)
results.incumbent_objective = self._engine.get_obj_value()
results.extra_info.iteration_count = self._engine.get_num_iters()
if self._is_mip():
results.extra_info.iteration_count = self._engine.get_num_iters()
else:
results.extra_info.iteration_count = None
results.timing_info.solve_time = self._engine.get_solve_time()
results.timing_info.timer = timer

Expand Down Expand Up @@ -256,3 +259,9 @@ def _get_error_type(
raise DeveloperError(
f"Unsupported KNITRO item type {item_type} and value type {value_type}."
)

def _is_mip(self) -> bool:
for var in self._model_data.variables:
if var.is_integer() or var.is_binary():
return True
return False
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