diff --git a/OMCompiler/SimulationRuntime/c/optimization/optimizer_main.c b/OMCompiler/SimulationRuntime/c/optimization/optimizer_main.c
index 49399ab8155..56ca930bb37 100644
--- a/OMCompiler/SimulationRuntime/c/optimization/optimizer_main.c
+++ b/OMCompiler/SimulationRuntime/c/optimization/optimizer_main.c
@@ -37,7 +37,7 @@
 #include "simulation_data.h"
 #include "simulation/options.h"
 
-static inline void optimizationWithIpopt(OptData*optData);
+static inline int optimizationWithIpopt(OptData*optData);
 static inline void freeOptimizerData(OptData*optData);
 
 int runOptimizer(DATA* data, threadData_t *threadData, SOLVER_INFO* solverInfo){
@@ -52,17 +52,19 @@ int runOptimizer(DATA* data, threadData_t *threadData, SOLVER_INFO* solverInfo){
   initial_guess_optimizer(optData, solverInfo);
   allocate_der_struct(&optData->s, &optData->dim ,data, optData);
 
-  optimizationWithIpopt(optData);
+  const int res = optimizationWithIpopt(optData);
   res2file(optData, solverInfo, optData->ipop.vopt);
   freeOptimizerData(optData);
-  return 0;
+  if(res == 0 /*Solve_Succeeded*/ || res == 1 /*Solved_To_Acceptable_Level*/)
+    return 0;
+  return -1;
 }
 
 /*!
  *  run optimization with ipopt
  *  author: Vitalij Ruge
  **/
-static inline void optimizationWithIpopt(OptData*optData){
+static inline int optimizationWithIpopt(OptData*optData){
   IpoptProblem nlp = NULL;
 
   const int NV = optData->dim.NV;
@@ -218,6 +220,7 @@ static inline void optimizationWithIpopt(OptData*optData){
   if(res != 0 && !ACTIVE_STREAM(LOG_IPOPT))
     warningStreamPrint(LOG_STDOUT, 0, "No optimal solution found!\nUse -lv=LOG_IPOPT for more information.");
   FreeIpoptProblem(nlp);
+  return res;
 }
 
 
diff --git a/OMCompiler/SimulationRuntime/c/simulation/solver/perform_simulation.c.inc b/OMCompiler/SimulationRuntime/c/simulation/solver/perform_simulation.c.inc
index 127e06129a7..b253504c06c 100644
--- a/OMCompiler/SimulationRuntime/c/simulation/solver/perform_simulation.c.inc
+++ b/OMCompiler/SimulationRuntime/c/simulation/solver/perform_simulation.c.inc
@@ -549,7 +549,13 @@ int prefixedName_performSimulation(DATA* data, threadData_t *threadData, SOLVER_
         infoStreamPrint(LOG_SOLVER, 0, "finished solver step %g", solverInfo->currentTime);
         messageClose(LOG_SOLVER);
 
-        if (S_OPTIMIZATION == solverInfo->solverMethod) break;
+        if (S_OPTIMIZATION == solverInfo->solverMethod){
+          if(retValIntegrator != 0){
+            retValue = -1;
+            infoStreamPrint(LOG_STDOUT, 0, "model terminate | optimization failed.");
+          }
+          break;
+        }
         syncStep = simulationUpdate(data, threadData, solverInfo);
         retry = 0; /* reset retry */
 
diff --git a/testsuite/openmodelica/cruntime/optimization/basic/CC.mos b/testsuite/openmodelica/cruntime/optimization/basic/CC.mos
index 8f816109a11..82afab9d22a 100644
--- a/testsuite/openmodelica/cruntime/optimization/basic/CC.mos
+++ b/testsuite/openmodelica/cruntime/optimization/basic/CC.mos
@@ -40,7 +40,7 @@ getErrorString();
 // true
 // ""
 // true
-// "CheckConstraintViolation_res.mat"
+// ""
 // EXIT: Problem has inconsistent variable bounds or constraint sides.
 //
 // "Warning: Alias variables $con$con2 = x with invalid limits min 3.0 > max 0.0