Index: Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs
===================================================================
diff -u -rd49770201655964042adccca08d2e9fb2217723d -r077ced627bcacbf6095471e30af352fbf2e4298d
--- Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs	(.../HydraRingCalculationInput.cs)	(revision d49770201655964042adccca08d2e9fb2217723d)
+++ Ringtoets/HydraRing/src/Ringtoets.HydraRing.Calculation/Data/Input/HydraRingCalculationInput.cs	(.../HydraRingCalculationInput.cs)	(revision 077ced627bcacbf6095471e30af352fbf2e4298d)
@@ -98,6 +98,17 @@
         }
 
         /// <summary>
+        /// Gets the variables to use during the calculation.
+        /// </summary>
+        public virtual IEnumerable<HydraRingVariable2> NewVariables
+        {
+            get
+            {
+                yield break;
+            }
+        }
+
+        /// <summary>
         /// Gets the profile points to use during the calculation.
         /// </summary>
         public virtual IEnumerable<HydraRingProfilePoint> ProfilePoints