Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/PipingBlighTests.cs
===================================================================
diff -u -r5248 -r5426
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/PipingBlighTests.cs	(.../PipingBlighTests.cs)	(revision 5248)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/PipingBlighTests.cs	(.../PipingBlighTests.cs)	(revision 5426)
@@ -26,6 +26,7 @@
 using Deltares.DamEngine.Data.Geotechnics;
 using Deltares.DamEngine.Data.Standard.Calculation;
 using Deltares.DamEngine.Interface;
+using Deltares.DamEngine.Io.XmlInput;
 using Deltares.DamEngine.Io.XmlOutput;
 using Deltares.DamEngine.TestHelpers;
 using NUnit.Framework;
@@ -280,4 +281,41 @@
             Assert.That(output.Results.CalculationMessages[4].Message1, Does.Contain("no uplift"));
         });
     }
+
+    [Test]
+    public void TestRunPipingBlighWithGeometry2DIsNotPossible()
+    {
+        // Based on DAM Tutorial Design.damx
+        // Except for the following changes:
+        // - Calculation type is Piping in segments.csv (instead of Stability)
+        // - Select model Piping Bligh
+        // - Select 1st location (DWP_1)
+        const string calcDir = "TestRunPipingBlighWithGeometry2DIsNotPossible";
+        if (Directory.Exists(calcDir))
+        {
+            Directory.Delete(calcDir, true); // delete previous results
+        }
+
+        const string tutorialStability2D = @"InputTutorialStability2D.xml";
+        string inputString = File.ReadAllText(tutorialStability2D);
+        string[] locations = ["DWP_1"];
+        inputString = XmlAdapter.SelectLocations(inputString, locations);
+
+        inputString = XmlAdapter.ChangeValueInXml(inputString, "ProjectPath", ""); // Current directory will be used
+        inputString = XmlAdapter.ChangeValueInXml(inputString, "CalculationMap", calcDir); // Current directory will be used
+        inputString = XmlAdapter.ChangeValueInXml(inputString, "FailureMechanismSystemType", "2"); // Piping
+        inputString = XmlAdapter.ChangeValueInXml(inputString, "SegmentFailureMechanismType", "2"); // Piping
+        inputString = XmlAdapter.ChangeStabilityToPiping(inputString);
+        inputString = XmlAdapter.ChangePipingInputModel(inputString, InputPipingModelType.Bligh);
+
+        var engineInterface = new EngineInterface(inputString);
+        string validationMessages = engineInterface.Validate();
+        Assert.Multiple(() =>
+        {
+            Assert.That(validationMessages, Does.Contain("A piping calculation with a 2D-geometry is not supported."));
+            Assert.That(engineInterface.DamProjectData.CalculationMessages, Has.Count.EqualTo(1));
+        });
+        Assert.That(engineInterface.DamProjectData.CalculationMessages[0].Message, Does.Contain("A piping calculation with a 2D-geometry is not supported."));
+    }
+
 }
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