Index: Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs
===================================================================
diff -u -r76a7de2e77e45645d0e7e485e03333baf9cc3b0d -r316e741c3eefe3aab13dd070b56654a6bc4c24f1
--- Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision 76a7de2e77e45645d0e7e485e03333baf9cc3b0d)
+++ Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision 316e741c3eefe3aab13dd070b56654a6bc4c24f1)
@@ -542,6 +542,7 @@
             {
                 var surfaceLinesImporter = new PipingSurfaceLinesCsvImporter(pipingFailureMechanism.SurfaceLines,
                                                                              demoAssessmentSection.ReferenceLine,
+                                                                             new RingtoetsPipingSurfaceLineReplaceDataStrategy(), 
                                                                              Path.Combine(embeddedResourceFileWriter.TargetFolderPath,
                                                                                           "DR6_surfacelines.csv"));
                 surfaceLinesImporter.Import();