Index: DamClients/DamUI/trunk/src/Dam/Deltares.Dam.Tests/LocationTest.cs
===================================================================
diff -u -r5515 -r5518
--- DamClients/DamUI/trunk/src/Dam/Deltares.Dam.Tests/LocationTest.cs	(.../LocationTest.cs)	(revision 5515)
+++ DamClients/DamUI/trunk/src/Dam/Deltares.Dam.Tests/LocationTest.cs	(.../LocationTest.cs)	(revision 5518)
@@ -112,7 +112,7 @@
 
                     string header = LocalizationManager.GetTranslatedText(typeof(Location), "IntrusionVerticalWaterPressure");
                     string selectedModel = LocalizationManager.GetTranslatedText(typeof(Location), model.ToString());
-                    string message = string.Format(LocalizationManager.GetTranslatedText(typeof(Location), expectedWarning), [header, selectedModel]);
+                    string message = string.Format(LocalizationManager.GetTranslatedText(typeof(Location), expectedWarning), header, selectedModel);
                     Assert.That(validationResults[0].Text, Is.EqualTo(message));
                 });
             }
Index: DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Location.cs
===================================================================
diff -u -r5514 -r5518
--- DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Location.cs	(.../Location.cs)	(revision 5514)
+++ DamClients/DamUI/trunk/src/DamClientsLibrary/Deltares.Dam.Data/Location.cs	(.../Location.cs)	(revision 5518)
@@ -27,6 +27,7 @@
 using System.Linq;
 using System.Xml.Serialization;
 using Deltares.Dam.Data.Sensors;
+using Deltares.DamEngine.Data.Standard;
 using Deltares.Geographic;
 using Deltares.Geometry;
 using Deltares.Geotechnics.Converter;
@@ -1751,15 +1752,15 @@
         {
             return new[]
             {
-                new ValidationResult(ValidationResultType.Warning, String.Format(LocalizationManager.GetTranslatedText(this, "UseOfPenetrationLengthWithoutSemiTimeDependentModel"), [header, selectedModel]), this, "PenetrationLength", "AssignMinValue", this)
+                new ValidationResult(ValidationResultType.Warning, String.Format(LocalizationManager.GetTranslatedText(this, "UseOfPenetrationLengthWithoutSemiTimeDependentModel"), header, selectedModel), this, "PenetrationLength", "AssignMinValue", this)
             };
         }
         
-        if ((PenetrationLength == 0) && (IntrusionVerticalWaterPressure == IntrusionVerticalWaterPressureType.SemiTimeDependent))
+        if (PenetrationLength.IsLessThanOrEqualTo(0, 1e-6) && (IntrusionVerticalWaterPressure == IntrusionVerticalWaterPressureType.SemiTimeDependent))
         {
             return new[]
             {
-                new ValidationResult(ValidationResultType.Warning, String.Format(LocalizationManager.GetTranslatedText(this, "UseOfSemiTimeDependentModelWithoutPenetrationLength"), [header, selectedModel]), this)
+                new ValidationResult(ValidationResultType.Warning, String.Format(LocalizationManager.GetTranslatedText(this, "UseOfSemiTimeDependentModelWithoutPenetrationLength"), header, selectedModel), this)
             };
         }