change the sequence of bigm and detect fixed vars

ZedongPeng · Sep 8, 2024 · 49ea85c · 49ea85c
1 parent 1144dc1
commit 49ea85c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pyomo/contrib/gdpopt/ldsda.py b/pyomo/contrib/gdpopt/ldsda.py
@@ -178,6 +178,7 @@ def _solve_GDP_subproblem(self, external_var_value, search_type, config):
         try:
             with SuppressInfeasibleWarning():
                 try:
+                    TransformationFactory('gdp.bigm').apply_to(subproblem)
                     fbbt(subproblem, integer_tol=config.integer_tolerance)
                     TransformationFactory('contrib.detect_fixed_vars').apply_to(
                         subproblem
@@ -188,7 +189,6 @@ def _solve_GDP_subproblem(self, external_var_value, search_type, config):
                     TransformationFactory(
                         'contrib.deactivate_trivial_constraints'
                     ).apply_to(subproblem, tmp=False, ignore_infeasible=False)
-                    TransformationFactory('gdp.bigm').apply_to(subproblem)
                 except InfeasibleConstraintException:
                     return False
                 minlp_args = dict(config.minlp_solver_args)