Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs
===================================================================
diff -u -r886f53016571b5d7a65318c6e29d6da9385bbade -rbf0bb686ee2b533188f8eabdc09732e52d775888
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs	(.../DuneLocationCalculationGuiService.cs)	(revision 886f53016571b5d7a65318c6e29d6da9385bbade)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/GuiServices/DuneLocationCalculationGuiService.cs	(.../DuneLocationCalculationGuiService.cs)	(revision bf0bb686ee2b533188f8eabdc09732e52d775888)
@@ -26,6 +26,7 @@
 using Core.Common.Gui.Forms.ProgressDialog;
 using log4net;
 using Ringtoets.Common.IO.HydraRing;
+using Ringtoets.Common.Service;
 using Ringtoets.DuneErosion.Data;
 using Ringtoets.DuneErosion.Service;
 using RingtoetsCommonFormsResources = Ringtoets.Common.Forms.Properties.Resources;
@@ -78,6 +79,12 @@
 
             string validationProblem = HydraulicBoundaryDatabaseHelper.ValidateFilesForCalculation(hydraulicBoundaryDatabaseFilePath,
                                                                                                    preprocessorDirectory);
+
+            if (string.IsNullOrEmpty(validationProblem))
+            {
+                TargetProbabilityCalculationServiceHelper.ValidateTargetProbability(norm, logMessage => validationProblem = logMessage);
+            }
+
             if (!string.IsNullOrEmpty(validationProblem))
             {
                 log.ErrorFormat(RingtoetsCommonFormsResources.CalculateHydraulicBoundaryLocation_Start_calculation_failed_0_,
Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/Ringtoets.DuneErosion.Forms.csproj
===================================================================
diff -u -rbece430ab05641ddb6fe2976c5683028b82acb08 -rbf0bb686ee2b533188f8eabdc09732e52d775888
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/Ringtoets.DuneErosion.Forms.csproj	(.../Ringtoets.DuneErosion.Forms.csproj)	(revision bece430ab05641ddb6fe2976c5683028b82acb08)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Forms/Ringtoets.DuneErosion.Forms.csproj	(.../Ringtoets.DuneErosion.Forms.csproj)	(revision bf0bb686ee2b533188f8eabdc09732e52d775888)
@@ -125,6 +125,11 @@
       <Name>Ringtoets.Common.Primitives</Name>
       <Private>False</Private>
     </ProjectReference>
+    <ProjectReference Include="..\..\..\Common\src\Ringtoets.Common.Service\Ringtoets.Common.Service.csproj">
+      <Project>{D951D6DA-FE83-4920-9FDB-63BF96480B54}</Project>
+      <Name>Ringtoets.Common.Service</Name>
+      <Private>False</Private>
+    </ProjectReference>
     <ProjectReference Include="..\..\..\Common\src\Ringtoets.Common.Util\Ringtoets.Common.Util.csproj">
       <Project>{6A074D65-A81C-4C1C-8E24-F36C916E4ED7}</Project>
       <Name>Ringtoets.Common.Util</Name>
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/GuiServices/DuneLocationCalculationGuiServiceTest.cs
===================================================================
diff -u -re5e17b215166c0d4451d922e477cc4d0a4c15205 -rbf0bb686ee2b533188f8eabdc09732e52d775888
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/GuiServices/DuneLocationCalculationGuiServiceTest.cs	(.../DuneLocationCalculationGuiServiceTest.cs)	(revision e5e17b215166c0d4451d922e477cc4d0a4c15205)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/GuiServices/DuneLocationCalculationGuiServiceTest.cs	(.../DuneLocationCalculationGuiServiceTest.cs)	(revision bf0bb686ee2b533188f8eabdc09732e52d775888)
@@ -185,6 +185,37 @@
         }
 
         [Test]
+        public void Calculate_InvalidNorm_LogsError()
+        {
+            // Setup
+            var calculatorFactory = mockRepository.StrictMock<IHydraRingCalculatorFactory>();
+            mockRepository.ReplayAll();
+
+            using (var viewParent = new Form())
+            using (new HydraRingCalculatorFactoryConfig(calculatorFactory))
+            {
+                var guiService = new DuneLocationCalculationGuiService(viewParent);
+
+                // Call
+                Action call = () => guiService.Calculate(Enumerable.Empty<DuneLocationCalculation>(),
+                                                         validFilePath,
+                                                         validPreprocessorDirectory,
+                                                         1.0);
+
+                // Assert
+                TestHelper.AssertLogMessages(call, messages =>
+                {
+                    string[] msgs = messages.ToArray();
+                    Assert.AreEqual(1, msgs.Length);
+                    Assert.AreEqual("Berekeningen konden niet worden gestart. Doelkans is te groot om een berekening uit te kunnen voeren.", msgs.First());
+                });
+            }
+
+            mockRepository.VerifyAll();
+        }
+
+
+        [Test]
         public void Calculate_ValidPathOneCalculationInTheList_LogsMessages()
         {
             // Setup