fix

examples/cpp/uncapacitated_facility_location.cc

@@ -141,7 +141,7 @@ static void UncapacitatedFacilityLocation(
   }
   // Set options and solve
   if (optimization_problem_type != MPSolver::SCIP_MIXED_INTEGER_PROGRAMMING) {
-    if (!solver.SetNumThreads(8)) {
+    if (!solver.SetNumThreads(8).ok()) {
       LOG(INFO) << "Could not set parallelism for " << optimization_problem_type;
     }
   }