Index: Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs
===================================================================
diff -u -rc964c048005d93b097a1e6a817dace95b293040f -rffe405e6b0f8b4d10e6be78cf7735c554eb42a93
--- Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision c964c048005d93b097a1e6a817dace95b293040f)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision ffe405e6b0f8b4d10e6be78cf7735c554eb42a93)
@@ -28,6 +28,7 @@
 using Ringtoets.ClosingStructures.Service;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Calculation;
+using Ringtoets.Common.Data.FailureMechanism;
 using Ringtoets.GrassCoverErosionInwards.Data;
 using Ringtoets.GrassCoverErosionInwards.Service;
 using Ringtoets.GrassCoverErosionOutwards.Data;
@@ -231,7 +232,7 @@
 
             var list = new List<IObservable>();
 
-            foreach (var failureMechanism in assessmentSection.GetFailureMechanisms())
+            foreach (IFailureMechanism failureMechanism in assessmentSection.GetFailureMechanisms())
             {
                 var pipingFailureMechanism = failureMechanism as PipingFailureMechanism;
                 var grassCoverErosionInwardsFailureMechanism = failureMechanism as GrassCoverErosionInwardsFailureMechanism;
@@ -246,34 +247,38 @@
                 {
                     list.AddRange(PipingDataSynchronizationService.ClearReferenceLineDependentData(pipingFailureMechanism));
                 }
-                if (grassCoverErosionInwardsFailureMechanism != null)
+                else if (grassCoverErosionInwardsFailureMechanism != null)
                 {
                     list.AddRange(GrassCoverErosionInwardsDataSynchronizationService.ClearReferenceLineDependentData(grassCoverErosionInwardsFailureMechanism));
                 }
-                if (stabilityStoneCoverFailureMechanism != null)
+                else if (stabilityStoneCoverFailureMechanism != null)
                 {
                     list.AddRange(StabilityStoneCoverDataSynchronizationService.ClearReferenceLineDependentData(stabilityStoneCoverFailureMechanism));
                 }
-                if (waveImpactAsphaltCoverFailureMechanism != null)
+                else if (waveImpactAsphaltCoverFailureMechanism != null)
                 {
                     list.AddRange(WaveImpactAsphaltCoverDataSynchronizationService.ClearReferenceLineDependentData(waveImpactAsphaltCoverFailureMechanism));
                 }
-                if (grassCoverErosionOutwardsFailureMechanism != null)
+                else if (grassCoverErosionOutwardsFailureMechanism != null)
                 {
                     list.AddRange(GrassCoverErosionOutwardsDataSynchronizationService.ClearReferenceLineDependentData(grassCoverErosionOutwardsFailureMechanism));
                 }
-                if (heightStructuresFailureMechanism != null)
+                else if (heightStructuresFailureMechanism != null)
                 {
                     list.AddRange(HeightStructuresDataSynchronizationService.ClearReferenceLineDependentData(heightStructuresFailureMechanism));
                 }
-                if (closingStructuresFailureMechanism != null)
+                else if (closingStructuresFailureMechanism != null)
                 {
                     list.AddRange(ClosingStructuresDataSynchronizationService.ClearReferenceLineDependentData(closingStructuresFailureMechanism));
                 }
-                if (stabilityPointStructuresFailureMechanism != null)
+                else if (stabilityPointStructuresFailureMechanism != null)
                 {
                     list.AddRange(StabilityPointStructuresDataSynchronizationService.ClearReferenceLineDependentData(stabilityPointStructuresFailureMechanism));
                 }
+                else
+                {
+                    list.AddRange(ClearReferenceLineDependentData(failureMechanism));
+                }
             }
 
             // Lastly: clear the reference line:
@@ -282,5 +287,14 @@
 
             return list;
         }
+
+        private static IEnumerable<IObservable> ClearReferenceLineDependentData(IFailureMechanism failureMechanism)
+        {
+            failureMechanism.ClearAllSections();
+            return new[]
+            {
+                failureMechanism
+            };
+        }
     }
 }
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