Index: Ringtoets/Integration/src/Ringtoets.Integration.Data/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactory.cs
===================================================================
diff -u -r3f6e53d41b52485159c3c2b34693e30bfb294958 -r5074f618d0207c1a9cb63d2c8a4a1b92a944dc73
--- Ringtoets/Integration/src/Ringtoets.Integration.Data/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactory.cs	(.../MacroStabilityOutwardsFailureMechanismAssemblyFactory.cs)	(revision 3f6e53d41b52485159c3c2b34693e30bfb294958)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Data/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactory.cs	(.../MacroStabilityOutwardsFailureMechanismAssemblyFactory.cs)	(revision 5074f618d0207c1a9cb63d2c8a4a1b92a944dc73)
@@ -32,6 +32,7 @@
 using Ringtoets.Common.Data.Probability;
 using Ringtoets.Common.Primitives;
 using Ringtoets.Integration.Data.StandAlone.SectionResults;
+using RingtoetsCommonDataResources = Ringtoets.Common.Data.Properties.Resources;
 
 namespace Ringtoets.Integration.Data.StandAlone.AssemblyFactories
 {
@@ -289,23 +290,27 @@
                 return FailureMechanismAssemblyResultFactory.CreateNotApplicableCategory();
             }
 
-            IEnumerable<FailureMechanismSectionAssemblyCategoryGroup> sectionAssemblies =
-                failureMechanism.SectionResults.Select(sectionResult => GetSectionAssemblyCategoryGroup(sectionResult,
-                                                                                                        failureMechanism,
-                                                                                                        assessmentSection)).ToArray();
-
-            IAssemblyToolCalculatorFactory calculatorFactory = AssemblyToolCalculatorFactory.Instance;
-            IFailureMechanismAssemblyCalculator calculator =
-                calculatorFactory.CreateFailureMechanismAssemblyCalculator(AssemblyToolKernelFactory.Instance);
-
             try
             {
+                IEnumerable<FailureMechanismSectionAssemblyCategoryGroup> sectionAssemblies =
+                    failureMechanism.SectionResults.Select(sectionResult => GetSectionAssemblyCategoryGroup(sectionResult,
+                                                                                                            failureMechanism,
+                                                                                                            assessmentSection)).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);
+            }
         }
 
         private static AssemblyCategoriesInput CreateAssemblyCategoriesInput(MacroStabilityOutwardsFailureMechanism failureMechanism,
Index: Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactoryTest.cs
===================================================================
diff -u -r1b06b06acb5f70a4adc60c28ee9bcd3e9fd406a3 -r5074f618d0207c1a9cb63d2c8a4a1b92a944dc73
--- Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactoryTest.cs	(.../MacroStabilityOutwardsFailureMechanismAssemblyFactoryTest.cs)	(revision 1b06b06acb5f70a4adc60c28ee9bcd3e9fd406a3)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Data.Test/StandAlone/AssemblyFactories/MacroStabilityOutwardsFailureMechanismAssemblyFactoryTest.cs	(.../MacroStabilityOutwardsFailureMechanismAssemblyFactoryTest.cs)	(revision 5074f618d0207c1a9cb63d2c8a4a1b92a944dc73)
@@ -1010,6 +1010,37 @@
             }
         }
 
+        [Test]
+        public void AssembleFailureMechanism_FailureMechanismSectionCalculatorThrowsException_ThrowsAssemblyException()
+        {
+            // Setup
+            var failureMechanism = new MacroStabilityOutwardsFailureMechanism();
+            failureMechanism.AddSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection());
+
+            var mocks = new MockRepository();
+            IAssessmentSection assessmentSection = AssessmentSectionHelper.CreateAssessmentSectionStub(failureMechanism, mocks);
+            mocks.ReplayAll();
+
+            using (new AssemblyToolCalculatorFactoryConfig())
+            {
+                var calculatorfactory = (TestAssemblyToolCalculatorFactory)AssemblyToolCalculatorFactory.Instance;
+                FailureMechanismSectionAssemblyCalculatorStub calculator = calculatorfactory.LastCreatedFailureMechanismSectionAssemblyCalculator;
+                calculator.ThrowExceptionOnCalculate = true;
+
+                // Call
+                TestDelegate call = () => MacroStabilityOutwardsFailureMechanismAssemblyFactory.AssembleFailureMechanism(
+                    failureMechanism,
+                    assessmentSection);
+
+                // Assert
+                var exception = Assert.Throws<AssemblyException>(call);
+                Exception innerException = exception.InnerException;
+                Assert.IsInstanceOf<AssemblyException>(innerException);
+                Assert.AreEqual("Voor een of meerdere vakken kan geen resultaat worden bepaald.", exception.Message);
+                mocks.VerifyAll();
+            }
+        }
+
         #endregion
     }
 }
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