Index: Ringtoets/Common/src/Ringtoets.Common.IO/ReferenceLines/ReferenceLineImporter.cs
===================================================================
diff -u -r05a4b5f35f68fcccf274c23bddfc05a4a7731919 -rd8361fdbbf28e4fb7e236be6fbf5f6a15045334b
--- Ringtoets/Common/src/Ringtoets.Common.IO/ReferenceLines/ReferenceLineImporter.cs	(.../ReferenceLineImporter.cs)	(revision 05a4b5f35f68fcccf274c23bddfc05a4a7731919)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/ReferenceLines/ReferenceLineImporter.cs	(.../ReferenceLineImporter.cs)	(revision d8361fdbbf28e4fb7e236be6fbf5f6a15045334b)
@@ -85,15 +85,18 @@
 
         public override void DoPostImportUpdates()
         {
+            if (Canceled)
+            {
+                return;
+            }
+
             replacementHandler.DoPostReplacementUpdates();
+
             base.DoPostImportUpdates();
-        }
 
-        protected override IEnumerable<IObservable> AffectedNonTargetObservableInstances
-        {
-            get
+            foreach (var changedObservable in changedObservables)
             {
-                return changedObservables;
+                changedObservable.NotifyObservers();
             }
         }