Index: DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs
===================================================================
diff -u -r4556 -r4574
--- DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 4556)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/Geotechnics/Soil.cs	(.../Soil.cs)	(revision 4574)
@@ -89,9 +89,9 @@
         CuBottom = aSoil.CuBottom;
         UsePop = aSoil.UsePop;
         StrengthIncreaseExponent = aSoil.StrengthIncreaseExponent;
-        if ((ShearStrengthModel == Geotechnics.ShearStrengthModel.SigmaTauCurve) && (aSoil.SigmaTauCurve != null))
+        SigmaTauCurve = new SigmaTauCurve();
+        if (aSoil.SigmaTauCurve != null)
         {
-            SigmaTauCurve = new SigmaTauCurve();
             SigmaTauCurve.Assign(aSoil.SigmaTauCurve);
         }
     }
@@ -269,7 +269,7 @@
     /// <summary>
     /// The sigma tau curve (for Shear Strength Model = SigmaTauCurve)  
     /// </summary>
-    public SigmaTauCurve SigmaTauCurve { get; set; }
+    public SigmaTauCurve SigmaTauCurve { get; set; } = new();
 
     #endregion
 }
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