Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Integration.Test/StabilityStoneCoverWaveConditionsCalculationActivityIntegrationTest.cs
===================================================================
diff -u -r1d64c85fa6d013812d3f38fa09ae4e7ec82480fe -re07044ef611f4a005447703ffba9f24b7c5acb90
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Integration.Test/StabilityStoneCoverWaveConditionsCalculationActivityIntegrationTest.cs	(.../StabilityStoneCoverWaveConditionsCalculationActivityIntegrationTest.cs)	(revision 1d64c85fa6d013812d3f38fa09ae4e7ec82480fe)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Integration.Test/StabilityStoneCoverWaveConditionsCalculationActivityIntegrationTest.cs	(.../StabilityStoneCoverWaveConditionsCalculationActivityIntegrationTest.cs)	(revision e07044ef611f4a005447703ffba9f24b7c5acb90)
@@ -31,12 +31,14 @@
 using Rhino.Mocks;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.TestUtil;
+using Ringtoets.Common.IO.FileImporters;
 using Ringtoets.HydraRing.Calculation.Calculator.Factory;
 using Ringtoets.HydraRing.Calculation.Data;
 using Ringtoets.HydraRing.Calculation.Data.Input.WaveConditions;
 using Ringtoets.HydraRing.Calculation.TestUtil;
 using Ringtoets.HydraRing.Calculation.TestUtil.Calculator;
 using Ringtoets.HydraRing.Data;
+using Ringtoets.Integration.Data;
 using Ringtoets.Revetment.Data;
 using Ringtoets.StabilityStoneCover.Data;
 using Ringtoets.StabilityStoneCover.Service;
@@ -384,6 +386,65 @@
         }
 
         [Test]
+        public void Run_UnexplainedErrorInCalculation_ActivityStateFailed()
+        {
+            // Setup
+            var assessmentSection = new AssessmentSection(AssessmentSectionComposition.Dike);
+
+            using (var importer = new HydraulicBoundaryDatabaseImporter())
+            {
+                importer.Import(assessmentSection, validFilePath);
+            }
+
+            var failureMechanism = new StabilityStoneCoverFailureMechanism();
+
+            StabilityStoneCoverWaveConditionsCalculation calculation = GetValidCalculation();
+
+            var activity = new StabilityStoneCoverWaveConditionsCalculationActivity(calculation, testDataPath, failureMechanism, assessmentSection);
+            using (new HydraRingCalculatorFactoryConfig())
+            {
+                var calculator = ((TestHydraRingCalculatorFactory)HydraRingCalculatorFactory.Instance).WaveConditionsCosineCalculator;
+                calculator.EndInFailure = true;
+
+                // Call
+                activity.Run();
+
+                // Assert
+                Assert.AreEqual(ActivityState.Failed, activity.State);
+            }
+        }
+
+        [Test]
+        public void Run_ErrorInCalculation_ActivityStateFailed()
+        {
+            // Setup
+            var assessmentSection = new AssessmentSection(AssessmentSectionComposition.Dike);
+
+            using (var importer = new HydraulicBoundaryDatabaseImporter())
+            {
+                importer.Import(assessmentSection, validFilePath);
+            }
+
+            var failureMechanism = new StabilityStoneCoverFailureMechanism();
+
+            StabilityStoneCoverWaveConditionsCalculation calculation = GetValidCalculation();
+
+            var activity = new StabilityStoneCoverWaveConditionsCalculationActivity(calculation, testDataPath, failureMechanism, assessmentSection);
+            using (new HydraRingCalculatorFactoryConfig())
+            {
+                var calculator = ((TestHydraRingCalculatorFactory)HydraRingCalculatorFactory.Instance).WaveConditionsCosineCalculator;
+                calculator.EndInFailure = false;
+                calculator.LastErrorContent = "An error occured";
+
+                // Call
+                activity.Run();
+
+                // Assert
+                Assert.AreEqual(ActivityState.Failed, activity.State);
+            }
+        }
+
+        [Test]
         public void Run_CalculationFailed_OutputNull()
         {
             // Setup