Index: Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Data/StabilityStoneCoverFailureMechanismAssemblyFactory.cs
===================================================================
diff -u -r2e56eb67e5fd78a4bb66030897ae08d0de874af6 -r8d9701fc88424972b9f06c3e9f28fc55d85bebd9
--- Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Data/StabilityStoneCoverFailureMechanismAssemblyFactory.cs	(.../StabilityStoneCoverFailureMechanismAssemblyFactory.cs)	(revision 2e56eb67e5fd78a4bb66030897ae08d0de874af6)
+++ Ringtoets/StabilityStoneCover/src/Ringtoets.StabilityStoneCover.Data/StabilityStoneCoverFailureMechanismAssemblyFactory.cs	(.../StabilityStoneCoverFailureMechanismAssemblyFactory.cs)	(revision 8d9701fc88424972b9f06c3e9f28fc55d85bebd9)
@@ -29,6 +29,7 @@
 using Ringtoets.Common.Data.AssemblyTool;
 using Ringtoets.Common.Data.Exceptions;
 using Ringtoets.Common.Primitives;
+using RingtoetsCommonDataResources = Ringtoets.Common.Data.Properties.Resources;
 
 namespace Ringtoets.StabilityStoneCover.Data
 {
@@ -200,7 +201,6 @@
                        : AssembleCombinedAssessment(failureMechanismSectionResult);
         }
 
-
         /// <summary>
         /// Assembles the failure mechanism assembly.
         /// </summary>
@@ -222,21 +222,25 @@
                 return FailureMechanismAssemblyResultFactory.CreateNotApplicableCategory();
             }
 
-            IEnumerable<FailureMechanismSectionAssemblyCategoryGroup> sectionAssemblies =
-                failureMechanism.SectionResults.Select(GetSectionAssemblyCategoryGroup).ToArray();
-
-            IAssemblyToolCalculatorFactory calculatorFactory = AssemblyToolCalculatorFactory.Instance;
-            IFailureMechanismAssemblyCalculator calculator =
-                calculatorFactory.CreateFailureMechanismAssemblyCalculator(AssemblyToolKernelFactory.Instance);
-
             try
             {
+                IEnumerable<FailureMechanismSectionAssemblyCategoryGroup> sectionAssemblies =
+                    failureMechanism.SectionResults.Select(GetSectionAssemblyCategoryGroup).ToArray();
+
+                IAssemblyToolCalculatorFactory calculatorFactory = AssemblyToolCalculatorFactory.Instance;
+                IFailureMechanismAssemblyCalculator calculator =
+                    calculatorFactory.CreateFailureMechanismAssemblyCalculator(AssemblyToolKernelFactory.Instance);
+
                 return calculator.Assemble(sectionAssemblies);
             }
             catch (FailureMechanismAssemblyCalculatorException e)
             {
                 throw new AssemblyException(e.Message, e);
             }
+            catch (AssemblyException e)
+            {
+                throw new AssemblyException(RingtoetsCommonDataResources.FailureMechanismAssemblyFactory_Error_while_assembling_failureMechanism, e);
+            }
         }
     }
 }
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