Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs
===================================================================
diff -u -r2169 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 2169)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/FillDamFromXmlInputTests.cs	(.../FillDamFromXmlInputTests.cs)	(revision 2949)
@@ -161,7 +161,8 @@
                 "Loops",
             }; // TODO i.m.o the serializing of the geometry should be improved, so these ignores are not needed anymore
             var result = compare.Compare(expected, actual);
-            Assert.AreEqual(0, result.Differences.Count, "Differences found read/write Input object");
+            Assert.AreEqual(0, result.Differences.Count, 
+                "Differences found read/write Input object:" + result.DifferencesString);
 
         }
     }
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs
===================================================================
diff -u -r2925 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 2925)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillXmlInputFromDam.cs	(.../FillXmlInputFromDam.cs)	(revision 2949)
@@ -451,6 +451,10 @@
                 {
                     inputSoil.DilatancyType = ConversionHelper.ConvertToSoilDilatancyType(soil.DilatancyType.Value);
                 }
+                inputSoil.RRatioSpecified = !double.IsNaN(soil.RRatio);
+                inputSoil.RRatio = soil.RRatio;
+                inputSoil.StrengthIncreaseExponentSpecified = !double.IsNaN(soil.StrengthIncreaseExponent);
+                inputSoil.StrengthIncreaseExponent = soil.StrengthIncreaseExponent;
                 inputSoils[i] = inputSoil;
             }
         }
@@ -505,41 +509,38 @@
 
                 // Design options
                 var designOptions = new LocationDesignOptions();
-                if (designOptions != null)
-                {
-                    designOptions.RedesignDikeHeight = location.RedesignDikeHeight;
-                    designOptions.RedesignDikeShoulder = location.RedesignDikeShoulder;
-                    designOptions.ShoulderEmbankmentMaterial = location.ShoulderEmbankmentMaterial;
-                    designOptions.StabilityShoulderGrowSlope = location.StabilityShoulderGrowSlope;
-                    designOptions.StabilityShoulderGrowDeltaX = location.StabilityShoulderGrowDeltaX;
-                    designOptions.StabilitySlopeAdaptionDeltaX = location.StabilitySlopeAdaptionDeltaX;
-                    designOptions.SlopeAdaptionStartCotangent = location.SlopeAdaptionStartCotangent;
-                    designOptions.SlopeAdaptionEndCotangent = location.SlopeAdaptionEndCotangent;
-                    designOptions.SlopeAdaptionStepCotangent = location.SlopeAdaptionStepCotangent;
-                    designOptions.NewDikeTopWidthSpecified = location.UseNewDikeTopWidth;
-                    designOptions.NewDikeTopWidth = location.NewDikeTopWidth;
-                    designOptions.NewDikeSlopeInsideSpecified = location.UseNewDikeSlopeInside;
-                    designOptions.NewDikeSlopeInside = location.NewDikeSlopeInside;
-                    designOptions.NewDikeSlopeOutsideSpecified = location.UseNewDikeSlopeOutside;
-                    designOptions.NewDikeSlopeOutside = location.NewDikeSlopeOutside;
-                    designOptions.NewShoulderTopSlopeSpecified = location.UseNewShoulderTopSlope;
-                    designOptions.NewShoulderTopSlope = location.NewShoulderTopSlope;
-                    designOptions.NewShoulderBaseSlopeSpecified = location.UseNewShoulderBaseSlope;
-                    designOptions.NewShoulderBaseSlope = location.NewShoulderBaseSlope;
-                    designOptions.NewMaxHeightShoulderAsFractionSpecified = location.UseNewMaxHeightShoulderAsFraction;
-                    designOptions.NewMaxHeightShoulderAsFraction = location.NewMaxHeightShoulderAsFraction;
-                    designOptions.NewMinDistanceDikeToeStartDitchSpecified = location.UseNewMinDistanceDikeToeStartDitch;
-                    designOptions.NewMinDistanceDikeToeStartDitch = location.NewMinDistanceDikeToeStartDitch;
-                    designOptions.UseNewDitchDefinition = location.UseNewDitchDefinition;
-                    designOptions.NewWidthDitchBottomSpecified = location.UseNewDitchDefinition;
-                    designOptions.NewWidthDitchBottom = location.NewWidthDitchBottom;
-                    designOptions.NewSlopeAngleDitchSpecified = location.UseNewDitchDefinition;
-                    designOptions.NewSlopeAngleDitch = location.NewSlopeAngleDitch;
-                    designOptions.NewDepthDitchSpecified = location.UseNewDitchDefinition;
-                    designOptions.NewDepthDitch = location.NewDepthDitch;
-                    designOptions.StabilityDesignMethod = ConversionHelper.ConvertToInputStabilityDesignMethod(location.StabilityDesignMethod);
-                    inputLocation.DesignOptions = designOptions;
-                }
+                designOptions.RedesignDikeHeight = location.RedesignDikeHeight;
+                designOptions.RedesignDikeShoulder = location.RedesignDikeShoulder;
+                designOptions.ShoulderEmbankmentMaterial = location.ShoulderEmbankmentMaterial;
+                designOptions.StabilityShoulderGrowSlope = location.StabilityShoulderGrowSlope;
+                designOptions.StabilityShoulderGrowDeltaX = location.StabilityShoulderGrowDeltaX;
+                designOptions.StabilitySlopeAdaptionDeltaX = location.StabilitySlopeAdaptionDeltaX;
+                designOptions.SlopeAdaptionStartCotangent = location.SlopeAdaptionStartCotangent;
+                designOptions.SlopeAdaptionEndCotangent = location.SlopeAdaptionEndCotangent;
+                designOptions.SlopeAdaptionStepCotangent = location.SlopeAdaptionStepCotangent;
+                designOptions.NewDikeTopWidthSpecified = location.UseNewDikeTopWidth;
+                designOptions.NewDikeTopWidth = location.NewDikeTopWidth;
+                designOptions.NewDikeSlopeInsideSpecified = location.UseNewDikeSlopeInside;
+                designOptions.NewDikeSlopeInside = location.NewDikeSlopeInside;
+                designOptions.NewDikeSlopeOutsideSpecified = location.UseNewDikeSlopeOutside;
+                designOptions.NewDikeSlopeOutside = location.NewDikeSlopeOutside;
+                designOptions.NewShoulderTopSlopeSpecified = location.UseNewShoulderTopSlope;
+                designOptions.NewShoulderTopSlope = location.NewShoulderTopSlope;
+                designOptions.NewShoulderBaseSlopeSpecified = location.UseNewShoulderBaseSlope;
+                designOptions.NewShoulderBaseSlope = location.NewShoulderBaseSlope;
+                designOptions.NewMaxHeightShoulderAsFractionSpecified = location.UseNewMaxHeightShoulderAsFraction;
+                designOptions.NewMaxHeightShoulderAsFraction = location.NewMaxHeightShoulderAsFraction;
+                designOptions.NewMinDistanceDikeToeStartDitchSpecified = location.UseNewMinDistanceDikeToeStartDitch;
+                designOptions.NewMinDistanceDikeToeStartDitch = location.NewMinDistanceDikeToeStartDitch;
+                designOptions.UseNewDitchDefinition = location.UseNewDitchDefinition;
+                designOptions.NewWidthDitchBottomSpecified = location.UseNewDitchDefinition;
+                designOptions.NewWidthDitchBottom = location.NewWidthDitchBottom;
+                designOptions.NewSlopeAngleDitchSpecified = location.UseNewDitchDefinition;
+                designOptions.NewSlopeAngleDitch = location.NewSlopeAngleDitch;
+                designOptions.NewDepthDitchSpecified = location.UseNewDitchDefinition;
+                designOptions.NewDepthDitch = location.NewDepthDitch;
+                designOptions.StabilityDesignMethod = ConversionHelper.ConvertToInputStabilityDesignMethod(location.StabilityDesignMethod);
+                inputLocation.DesignOptions = designOptions;
 
                 inputLocation.DesignScenarios = new LocationDesignScenario[location.Scenarios.Count];
                 for (int j = 0; j < location.Scenarios.Count; j++)
Index: DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs
===================================================================
diff -u -r2799 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs	(.../DamInput.cs)	(revision 2799)
+++ DamEngine/trunk/src/Deltares.DamEngine.Io/DamInput.cs	(.../DamInput.cs)	(revision 2949)
@@ -2289,6 +2289,14 @@
         
         private bool dilatancyTypeFieldSpecified;
         
+        private double rRatioField;
+        
+        private bool rRatioFieldSpecified;
+        
+        private double strengthIncreaseExponentField;
+        
+        private bool strengthIncreaseExponentFieldSpecified;
+        
         /// <remarks/>
         [System.Xml.Serialization.XmlAttributeAttribute()]
         public string Name {
@@ -2629,6 +2637,50 @@
                 this.dilatancyTypeFieldSpecified = value;
             }
         }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlAttributeAttribute()]
+        public double RRatio {
+            get {
+                return this.rRatioField;
+            }
+            set {
+                this.rRatioField = value;
+            }
+        }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlIgnoreAttribute()]
+        public bool RRatioSpecified {
+            get {
+                return this.rRatioFieldSpecified;
+            }
+            set {
+                this.rRatioFieldSpecified = value;
+            }
+        }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlAttributeAttribute()]
+        public double StrengthIncreaseExponent {
+            get {
+                return this.strengthIncreaseExponentField;
+            }
+            set {
+                this.strengthIncreaseExponentField = value;
+            }
+        }
+        
+        /// <remarks/>
+        [System.Xml.Serialization.XmlIgnoreAttribute()]
+        public bool StrengthIncreaseExponentSpecified {
+            get {
+                return this.strengthIncreaseExponentFieldSpecified;
+            }
+            set {
+                this.strengthIncreaseExponentFieldSpecified = value;
+            }
+        }
     }
     
     /// <remarks/>
Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs
===================================================================
diff -u -r2503 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 2503)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 2949)
@@ -199,12 +199,12 @@
         /// </summary>
         public DilatancyType? DilatancyType { get; set; } = null;
 
-        /// <summary>
-        /// Gets or sets the strength increase exponent.
-        /// </summary>
-        /// <value>
-        /// The strength increase exponent.
-        /// </value>
+        /// <summary>Gets or sets the RRatio.</summary>
+        /// <value>The RRatio.</value>
+        public double RRatio { get; set; } = double.NaN;
+
+        /// <summary>Gets or sets the strength increase exponent.</summary>
+        /// <value>The strength increase exponent.</value>
         public double StrengthIncreaseExponent { get; set; } = double.NaN;
 
         /// <summary>
Index: DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs
===================================================================
diff -u -r2799 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 2799)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface/FillDamFromXmlInput.cs	(.../FillDamFromXmlInput.cs)	(revision 2949)
@@ -449,6 +449,8 @@
                 soil.SlopeRestProfile = inputSoil.SlopeRestProfileSpecified ? inputSoil.SlopeRestProfile : double.NaN;
                 soil.DilatancyType = inputSoil.DilatancyTypeSpecified ?
                     (DilatancyType?)ConversionHelper.ConvertToDilatancyType(inputSoil.DilatancyType) : null;
+                soil.RRatio = inputSoil.RRatioSpecified ? inputSoil.RRatio : double.NaN;
+                soil.StrengthIncreaseExponent = inputSoil.StrengthIncreaseExponentSpecified ? inputSoil.StrengthIncreaseExponent : double.NaN;
                 soils.Add(soil);
             }
         }
Index: DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForDamProjectData.cs
===================================================================
diff -u -r2936 -r2949
--- DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForDamProjectData.cs	(.../FactoryForDamProjectData.cs)	(revision 2936)
+++ DamEngine/trunk/src/Deltares.DamEngine.TestHelpers/Factories/FactoryForDamProjectData.cs	(.../FactoryForDamProjectData.cs)	(revision 2949)
@@ -268,11 +268,13 @@
                 soil.SlopeRestProfile = 15 + 0.1 * i;
                 soil.DilatancyType = DilatancyType.Zero;
 
+                soil.RRatio = 16 + 0.1 * i;
+                soil.StrengthIncreaseExponent = 17 + 0.1 * i;
+
                 //soil.CuBottom = 11 + 0.1 * i;
                 //soil.CuTop = 12 + 0.1 * i;
                 //soil.PoP = 15 + 0.1 * i;
                 //soil.RatioCuPc = 16 + 0.1 * i;
-                //soil.StrengthIncreaseExponent = 17 + 0.1 * i;
                 //soil.UsePop = true;
 
                 soil.BeddingAngle = 18 + 0.1 * i;
Index: DamEngine/trunk/xsd/DamSoil.xsd
===================================================================
diff -u -r2503 -r2949
--- DamEngine/trunk/xsd/DamSoil.xsd	(.../DamSoil.xsd)	(revision 2503)
+++ DamEngine/trunk/xsd/DamSoil.xsd	(.../DamSoil.xsd)	(revision 2949)
@@ -40,5 +40,7 @@
         </xs:restriction>
       </xs:simpleType>
     </xs:attribute>
+    <xs:attribute name="RRatio" type="xs:double" use="optional" />
+    <xs:attribute name="StrengthIncreaseExponent" type="xs:double" use="optional" />
   </xs:complexType>
 </xs:schema>
\ No newline at end of file