Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/StabilityPointStructuresFailureMechanismAssemblyFactory.cs
===================================================================
diff -u -r76d5e546e8087c3cd169dd2e6bb04556d88eec87 -rae1937fe2fcb175b4a0f9fa5f1aaed132431f66c
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/StabilityPointStructuresFailureMechanismAssemblyFactory.cs	(.../StabilityPointStructuresFailureMechanismAssemblyFactory.cs)	(revision 76d5e546e8087c3cd169dd2e6bb04556d88eec87)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Data/StabilityPointStructuresFailureMechanismAssemblyFactory.cs	(.../StabilityPointStructuresFailureMechanismAssemblyFactory.cs)	(revision ae1937fe2fcb175b4a0f9fa5f1aaed132431f66c)
@@ -236,6 +236,11 @@
                 throw new ArgumentNullException(nameof(assessmentSection));
             }
 
+            if (!failureMechanism.IsRelevant)
+            {
+                return FailureMechanismAssemblyFactory.CreateNotApplicableAssembly();
+            }
+
             IAssemblyToolCalculatorFactory calculatorFactory = AssemblyToolCalculatorFactory.Instance;
             AssemblyCategoriesInput assemblyCategoriesInput = CreateAssemblyCategoriesInput(failureMechanism, assessmentSection);
             IEnumerable<FailureMechanismSectionAssembly> sectionAssemblies = AssembleSections(failureMechanism,