Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2Extensions.cs
===================================================================
diff -u -r5565 -r5745
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2Extensions.cs	(.../SurfaceLine2Extensions.cs)	(revision 5565)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/SurfaceLine2Extensions.cs	(.../SurfaceLine2Extensions.cs)	(revision 5745)
@@ -670,7 +670,7 @@
         GeometryPoint dikeTopAtRiver = line.CharacteristicPoints.GetGeometryPoint(CharacteristicPointType.DikeTopAtRiver);
         if (level > dikeTopAtRiver.Z)
         {
-            throw new SurfaceLineException($"Level ({level:F2} m) should NOT be higher than surface line ({dikeTopAtRiver.Z:F2}))");
+            throw new SurfaceLineException($"Level ({level:F2} m) should NOT be higher than dike top at river side ({dikeTopAtRiver.Z:F2}))");
         }
     }
 
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs
===================================================================
diff -u -r5728 -r5745
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs	(.../SensorPLLineCreatorTest.cs)	(revision 5728)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Sensors/SensorPLLineCreatorTest.cs	(.../SensorPLLineCreatorTest.cs)	(revision 5745)
@@ -1257,14 +1257,14 @@
 
     [TestCase(8.001)]
     [TestCase(10.0)]
-    public void CreatePlLine_Pl1WithRiverLevelHigherThanSurfaceLine_Throws(double riverLevel)
+    public void CreatePlLine_Pl1WithRiverLevelHigherThanDikeTopAtRiverSide_Throws(double riverLevel)
     {
         // setup
         SetUpSensorData(riverLevel, out IDictionary<Sensor, double> sensorValues, out SensorLocation sensorLocation);
 
         var creator = new SensorPlLine1Creator(sensorLocation, sensorValues);
         // call
-        Assert.That(() => creator.CreatePlLine(), Throws.TypeOf(typeof(SurfaceLineException)).With.Message.Contains("should NOT be higher than surface line"));
+        Assert.That(() => creator.CreatePlLine(), Throws.TypeOf(typeof(SurfaceLineException)).With.Message.Contains("should NOT be higher than dike top at river side"));
     }
 
     [TestCase(-0.001)]
Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/MacroStabilityInwardsTests.cs
===================================================================
diff -u -r5708 -r5745
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/MacroStabilityInwardsTests.cs	(.../MacroStabilityInwardsTests.cs)	(revision 5708)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/MacroStabilityInwardsTests.cs	(.../MacroStabilityInwardsTests.cs)	(revision 5745)
@@ -499,7 +499,7 @@
         Assert.Multiple(() =>
         {
             Assert.That(output.Results.CalculationMessages[0].Message1, Does.Contain("Location 'DWP_1', subsoil scenario 'DWP_1.stix', design scenario '1': The preparation for this calculation failed."));
-            Assert.That(output.Results.CalculationMessages[1].Message1, Does.Contain("Level (5.50 m) should NOT be higher than surface line (5.24)"));
+            Assert.That(output.Results.CalculationMessages[1].Message1, Does.Contain("Level (5.50 m) should NOT be higher than dike top at river side (5.24)"));
         });
     }