Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs
===================================================================
diff -u -r2a81f01756e227d5ce93717b21b87e8a5cd5fcbb -racd375042fb10c2774f972b9dfe8a2cf366de1f2
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision 2a81f01756e227d5ce93717b21b87e8a5cd5fcbb)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingPlugin.cs	(.../PipingPlugin.cs)	(revision acd375042fb10c2774f972b9dfe8a2cf366de1f2)
@@ -693,7 +693,7 @@
             {
                 new FailureMechanismAssemblyCategoriesContext(failureMechanism,
                                                               assessmentSection,
-                                                              () => probabilityAssessmentInput.GetN(probabilityAssessmentInput.SectionLength)),
+                                                              () => probabilityAssessmentInput.GetN(assessmentSection.ReferenceLine.Length)),
                 new PipingScenariosContext(failureMechanism.CalculationsGroup, failureMechanism, assessmentSection),
                 new ProbabilityFailureMechanismSectionResultContext<PipingFailureMechanismSectionResult>(failureMechanism.SectionResults, failureMechanism, assessmentSection),
                 failureMechanism.OutputComments