Index: src/Deltares.DSoilModel.Forms.Tests/DSoilModelContextTest.cs
===================================================================
diff -u -r549 -r552
--- src/Deltares.DSoilModel.Forms.Tests/DSoilModelContextTest.cs	(.../DSoilModelContextTest.cs)	(revision 549)
+++ src/Deltares.DSoilModel.Forms.Tests/DSoilModelContextTest.cs	(.../DSoilModelContextTest.cs)	(revision 552)
@@ -172,23 +172,23 @@
                 UseDefaultShearStrengthModel = false, // or it will mess up this test !
 
             };
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.Cohesion)));
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.FrictionAngle)));
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.UsePop)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.Cohesion)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.FrictionAngle)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.UsePop)));
             Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.POP)));
-            Assert.AreEqual(false, context.IsEnabled(soil, soil.GetMemberName(s => s.RatioCuPc)));
-            Assert.AreEqual(false, context.IsEnabled(soil, soil.GetMemberName(s => s.StrengthIncreaseExponent)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.RatioCuPc)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.StrengthIncreaseExponent)));
 
             soil.ShearStrengthModel = ShearStrengthModel.CuCalculated;
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.Cohesion)));
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.FrictionAngle)));
-            Assert.IsNull(context.IsEnabled(soil, soil.GetMemberName(s => s.UsePop)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.Cohesion)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.FrictionAngle)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.UsePop)));
             soil.UsePop = true;
             Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.POP)));
-            Assert.AreEqual(false, context.IsEnabled(soil, soil.GetMemberName(s => s.RatioCuPc)));
-            Assert.AreEqual(false, context.IsEnabled(soil, soil.GetMemberName(s => s.StrengthIncreaseExponent)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.RatioCuPc)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.StrengthIncreaseExponent)));
             soil.UsePop = false;
-            Assert.AreEqual(false, context.IsEnabled(soil, soil.GetMemberName(s => s.POP)));
+            Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.POP)));
             Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.RatioCuPc)));
             Assert.AreEqual(true, context.IsEnabled(soil, soil.GetMemberName(s => s.StrengthIncreaseExponent)));
         }
Index: src/Deltares.DSoilModel.Forms/DSoilModelContext.cs
===================================================================
diff -u -r549 -r552
--- src/Deltares.DSoilModel.Forms/DSoilModelContext.cs	(.../DSoilModelContext.cs)	(revision 549)
+++ src/Deltares.DSoilModel.Forms/DSoilModelContext.cs	(.../DSoilModelContext.cs)	(revision 552)
@@ -339,6 +339,8 @@
                         return false;
                     }
                 }
+
+                return true; // all other parameters should be editable
             }
 
             var grid = source as GridViewControl;