Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs
===================================================================
diff -u -r7d4fdb527410c89577828ea5d84896945341bae8 -r30a62fed78e3d6ff8e442eedcb0a12e0b72ca2fb
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 7d4fdb527410c89577828ea5d84896945341bae8)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Service/GrassCoverErosionInwardsCalculationService.cs	(.../GrassCoverErosionInwardsCalculationService.cs)	(revision 30a62fed78e3d6ff8e442eedcb0a12e0b72ca2fb)
@@ -303,6 +303,15 @@
                 {
                     validationResult.Add(RingtoetsCommonServiceResources.CalculationService_ValidateInput_No_dike_profile_selected);
                 }
+                else
+                {
+                    if (double.IsNaN(inputParameters.Orientation))
+                    {
+                        string message = string.Format(RingtoetsCommonServiceResources.Validation_ValidateInput_No_value_entered_for_0_,
+                                                       GenerateParameterNameWithoutUnits(RingtoetsCommonForms.Orientation_DisplayName));
+                        validationResult.Add(message);
+                    }
+                }
 
                 if (inputParameters.UseBreakWater)
                 {
@@ -311,13 +320,6 @@
                         validationResult.Add(RingtoetsCommonServiceResources.Validation_Invalid_BreakWaterHeight_value);
                     }
                 }
-
-                if (double.IsNaN(inputParameters.Orientation))
-                {
-                    string message = string.Format(RingtoetsCommonServiceResources.Validation_ValidateInput_No_value_entered_for_0_,
-                                                   GenerateParameterNameWithoutUnits(RingtoetsCommonForms.Orientation_DisplayName));
-                    validationResult.Add(message);
-                }
             }
 
             return validationResult.ToArray();