Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/PipingSurfaceLinesCsvImporter.cs
===================================================================
diff -u -rf7d7a919dec1b7d79672af043f268cde57aab0ba -r4ec823c1dc309c279f947c0270b4ccc84f6239b8
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/PipingSurfaceLinesCsvImporter.cs	(.../PipingSurfaceLinesCsvImporter.cs)	(revision f7d7a919dec1b7d79672af043f268cde57aab0ba)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/FileImporter/PipingSurfaceLinesCsvImporter.cs	(.../PipingSurfaceLinesCsvImporter.cs)	(revision 4ec823c1dc309c279f947c0270b4ccc84f6239b8)
@@ -3,7 +3,6 @@
 using System.Drawing;
 using System.IO;
 using System.Linq;
-using Core.Common.Base;
 using Core.Common.Base.IO;
 
 using log4net;
@@ -209,12 +208,6 @@
             {
                 targetCollection.Add(readSurfaceLine);
             }
-
-            var observableTarget = targetCollection as IObservable;
-            if (observableTarget != null)
-            {
-                observableTarget.NotifyObservers();
-            }
         }
 
         private void HandleUserCancellingImport()