Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs	(.../ClosingStructuresCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Service/ClosingStructuresCalculationService.cs	(.../ClosingStructuresCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -123,7 +123,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.ErrorFormat(Resources.ClosingStructuresCalculationService_Calculate_Error_in_closing_structures_0_calculation_click_details_for_last_error_1,
@@ -171,11 +171,6 @@
             return !messages.Any();
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorContent);
-        }
-
         private static StructuresClosureCalculationInput CreateStructuresClosureCalculationInput(
             StructuresCalculation<ClosingStructuresInput> calculation,
             ClosingStructuresFailureMechanism failureMechanism,
Index: Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs
===================================================================
diff -u -re69acb9595f7bf1d202ddd1fb51934b66768b75d -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs	(.../CalculationServiceHelper.cs)	(revision e69acb9595f7bf1d202ddd1fb51934b66768b75d)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/CalculationServiceHelper.cs	(.../CalculationServiceHelper.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -95,5 +95,18 @@
             log.Info(string.Format(Resources.Calculation_Subject_0_ended_Time_1_,
                                    name, DateTimeService.CurrentTimeAsString));
         }
+
+        /// <summary>
+        /// Determines whether an error has occurred during the calculation.
+        /// </summary>
+        /// <param name="canceled">The canceled state of the calculation.</param>
+        /// <param name="exceptionThrown">Indicator if there is already an exception thrown in the calculation.</param>
+        /// <param name="lastErrorFileContent">The contents of the last error file.</param>
+        /// <returns><c>true</c> when a calculation isn't canceled, has not already thrown an exception and 
+        /// <paramref name="lastErrorFileContent"/> is set. <c>false</c> otherwise.</returns>
+        public static bool ErrorOccurred(bool canceled, bool exceptionThrown, string lastErrorFileContent)
+        {
+            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs	(.../DesignWaterLevelCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/DesignWaterLevelCalculationService.cs	(.../DesignWaterLevelCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -120,7 +120,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.Error(messageProvider.GetCalculationFailedMessage(hydraulicBoundaryLocation.Name, lastErrorFileContent));
@@ -148,11 +148,6 @@
             }
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private AssessmentLevelCalculationInput CreateInput(HydraulicBoundaryLocation hydraulicBoundaryLocation, double norm, string hydraulicBoundaryDatabaseFilePath)
         {
             var assessmentLevelCalculationInput = new AssessmentLevelCalculationInput(1, hydraulicBoundaryLocation.Id, norm);
Index: Ringtoets/Common/src/Ringtoets.Common.Service/WaveHeightCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Common/src/Ringtoets.Common.Service/WaveHeightCalculationService.cs	(.../WaveHeightCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/Common/src/Ringtoets.Common.Service/WaveHeightCalculationService.cs	(.../WaveHeightCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -121,7 +121,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.Error(messageProvider.GetCalculationFailedMessage(hydraulicBoundaryLocation.Name, lastErrorFileContent));
@@ -149,11 +149,6 @@
             }
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private WaveHeightCalculationInput CreateInput(HydraulicBoundaryLocation hydraulicBoundaryLocation, double norm, string hydraulicBoundaryDatabaseFilePath)
         {
             var waveHeightCalculationInput = new WaveHeightCalculationInput(1, hydraulicBoundaryLocation.Id, norm);
Index: Ringtoets/Common/test/Ringtoets.Common.Service.Test/CalculationServiceHelperTest.cs
===================================================================
diff -u -re69acb9595f7bf1d202ddd1fb51934b66768b75d -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Common/test/Ringtoets.Common.Service.Test/CalculationServiceHelperTest.cs	(.../CalculationServiceHelperTest.cs)	(revision e69acb9595f7bf1d202ddd1fb51934b66768b75d)
+++ Ringtoets/Common/test/Ringtoets.Common.Service.Test/CalculationServiceHelperTest.cs	(.../CalculationServiceHelperTest.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -138,6 +138,44 @@
             });
         }
 
+        [Test]
+        public void ErrorOccurred_CalculationNotCanceledOrExceptionThrownLastErrorSet_ReturnTrue()
+        {
+            // Call
+            bool errorOccurred = CalculationServiceHelper.ErrorOccurred(false, false, "An error has occurred.");
+
+            // Assert
+            Assert.IsTrue(errorOccurred);
+        }
+
+        [Test]
+        [TestCase(null)]
+        [TestCase("")]
+        public void ErrorOccurred_CalculationNotCanceledOrExceptionThrownLastErrorNotSet_ReturnFalse(string errorContent)
+        {
+            // Call
+            bool errorOccurred = CalculationServiceHelper.ErrorOccurred(false, false, errorContent);
+
+            // Assert
+            Assert.IsFalse(errorOccurred);
+        }
+
+        [Test]
+        [TestCase(true, true, "An error has occurred.")]
+        [TestCase(true, false, "An error has occurred.")]
+        [TestCase(false, true, "An error has occurred.")]
+        [TestCase(true, true, "")]
+        [TestCase(true, false, "")]
+        [TestCase(false, true, "")]
+        public void ErrorOccurred_LastErrorSetCalculationCanceldOrExceptionThrown_ReturnFalse(bool canceled, bool exceptionThrown, string errorContent)
+        {
+            // Call
+            bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, errorContent);
+
+            // Assert
+            Assert.IsFalse(errorOccurred);
+        }
+
         private static void AssertLogTime(string message, DateTime dateTime)
         {
             string[] logMessageArray = message.Split(':');
Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -190,7 +190,7 @@
             finally
             {
                 var lastErrorFileContent = overtoppingCalculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.ErrorFormat(Resources.GrassCoverErosionInwardsCalculationService_Calculate_Error_in_grass_cover_erosion_inwards_0_calculation_click_details_for_last_error_1, calculationName, lastErrorFileContent);
@@ -235,7 +235,7 @@
                 finally
                 {
                     var lastErrorFileContent = dikeHeightCalculator.LastErrorFileContent;
-                    if (ErrorOccurred(exceptionThrown, lastErrorFileContent))
+                    if (CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent))
                     {
                         log.ErrorFormat(Resources.GrassCoverErosionInwardsCalculationService_Calculate_Error_in_hbn_grass_cover_erosion_inwards_0_calculation_click_details_for_last_error_1, calculationName, lastErrorFileContent);
                     }
@@ -245,11 +245,6 @@
             }
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private static OvertoppingCalculationInput CreateOvertoppingInput(GrassCoverErosionInwardsCalculation calculation,
                                                                           FailureMechanismSection failureMechanismSection,
                                                                           GeneralGrassCoverErosionInwardsInput generalInput,
Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs	(.../HeightStructuresCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresCalculationService.cs	(.../HeightStructuresCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -147,7 +147,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.ErrorFormat(Resources.HeightStructuresCalculationService_Calculate_Error_in_height_structures_0_calculation_click_details_for_last_error_1,
@@ -164,11 +164,6 @@
             }
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private static StructuresOvertoppingCalculationInput CreateInput(
             StructuresCalculation<HeightStructuresInput> calculation,
             FailureMechanismSection failureMechanismSection,
Index: Ringtoets/Revetment/src/Ringtoets.Revetment.Service/WaveConditionsCalculationServiceBase.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/Revetment/src/Ringtoets.Revetment.Service/WaveConditionsCalculationServiceBase.cs	(.../WaveConditionsCalculationServiceBase.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/Revetment/src/Ringtoets.Revetment.Service/WaveConditionsCalculationServiceBase.cs	(.../WaveConditionsCalculationServiceBase.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -258,7 +258,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(Canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.ErrorFormat(CultureInfo.CurrentCulture,
@@ -277,11 +277,6 @@
             }
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !Canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private static WaveConditionsCosineCalculationInput CreateInput(RoundedDouble waterLevel,
                                                                         RoundedDouble a,
                                                                         RoundedDouble b,
Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs
===================================================================
diff -u -re39274536935505756861bab61ab2e379162b33e -r3e9eb63e09c270127a0db49f2dea3da5ff3a3639
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision e39274536935505756861bab61ab2e379162b33e)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Service/StabilityPointStructuresCalculationService.cs	(.../StabilityPointStructuresCalculationService.cs)	(revision 3e9eb63e09c270127a0db49f2dea3da5ff3a3639)
@@ -143,7 +143,7 @@
             finally
             {
                 var lastErrorFileContent = calculator.LastErrorFileContent;
-                bool errorOccurred = ErrorOccurred(exceptionThrown, lastErrorFileContent);
+                bool errorOccurred = CalculationServiceHelper.ErrorOccurred(canceled, exceptionThrown, lastErrorFileContent);
                 if (errorOccurred)
                 {
                     log.ErrorFormat(Resources.StabilityPointStructuresCalculationService_Calculate_Error_in_stabilityPoint_structures_0_calculation_click_details_for_last_error_1,
@@ -173,11 +173,6 @@
             canceled = true;
         }
 
-        private bool ErrorOccurred(bool exceptionThrown, string lastErrorFileContent)
-        {
-            return !canceled && !exceptionThrown && !string.IsNullOrEmpty(lastErrorFileContent);
-        }
-
         private StructuresStabilityPointCalculationInput CreateStructuresStabilityPointCalculationInput(
             StructuresCalculation<StabilityPointStructuresInput> calculation,
             StabilityPointStructuresFailureMechanism failureMechanism,