Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismAssemblyFactory.cs
===================================================================
diff -u -rc8bf4ce67c6124901d09d163f5d7056bcd810481 -r8554c8723c3d665efd0a9d5e0ea48e7494ee680d
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismAssemblyFactory.cs	(.../DuneErosionFailureMechanismAssemblyFactory.cs)	(revision c8bf4ce67c6124901d09d163f5d7056bcd810481)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Data/DuneErosionFailureMechanismAssemblyFactory.cs	(.../DuneErosionFailureMechanismAssemblyFactory.cs)	(revision 8554c8723c3d665efd0a9d5e0ea48e7494ee680d)
@@ -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.DuneErosion.Data
 {
@@ -220,21 +221,25 @@
                 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);
+            }
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismAssemblyFactoryTest.cs
===================================================================
diff -u -r8138b90464358d50c5aa81142b37d309cbdb2c4c -r8554c8723c3d665efd0a9d5e0ea48e7494ee680d
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismAssemblyFactoryTest.cs	(.../DuneErosionFailureMechanismAssemblyFactoryTest.cs)	(revision 8138b90464358d50c5aa81142b37d309cbdb2c4c)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Data.Test/DuneErosionFailureMechanismAssemblyFactoryTest.cs	(.../DuneErosionFailureMechanismAssemblyFactoryTest.cs)	(revision 8554c8723c3d665efd0a9d5e0ea48e7494ee680d)
@@ -641,6 +641,30 @@
             }
         }
 
+        [Test]
+        public void AssembleFailureMechanism_FailureMechanismSectionCalculatorThrowsException_ThrowsAssemblyException()
+        {
+            // Setup
+            var failureMechanism = new DuneErosionFailureMechanism();
+            failureMechanism.AddSection(FailureMechanismSectionTestFactory.CreateFailureMechanismSection());
+            
+            using (new AssemblyToolCalculatorFactoryConfig())
+            {
+                var calculatorfactory = (TestAssemblyToolCalculatorFactory)AssemblyToolCalculatorFactory.Instance;
+                FailureMechanismSectionAssemblyCalculatorStub calculator = calculatorfactory.LastCreatedFailureMechanismSectionAssemblyCalculator;
+                calculator.ThrowExceptionOnCalculate = true;
+
+                // Call
+                TestDelegate call = () => DuneErosionFailureMechanismAssemblyFactory.AssembleFailureMechanism(failureMechanism);
+
+                // 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);
+            }
+        }
+
         #endregion
     }
 }
\ No newline at end of file