Index: Ringtoets/Integration/src/Ringtoets.Integration.IO/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreator.cs
===================================================================
diff -u -re8210040e3962fda1daa0ec9d90ecfb10e351eb3 -r64bd60c5f92229044d3adf59d096a3b29f69ab4a
--- Ringtoets/Integration/src/Ringtoets.Integration.IO/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreator.cs	(.../SerializableCombinedFailureMechanismSectionAssemblyResultCreator.cs)	(revision e8210040e3962fda1daa0ec9d90ecfb10e351eb3)
+++ Ringtoets/Integration/src/Ringtoets.Integration.IO/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreator.cs	(.../SerializableCombinedFailureMechanismSectionAssemblyResultCreator.cs)	(revision 64bd60c5f92229044d3adf59d096a3b29f69ab4a)
@@ -20,8 +20,10 @@
 // All rights reserved.
 
 using System;
+using Ringtoets.AssemblyTool.Data;
 using Ringtoets.AssemblyTool.IO.Model.DataTypes;
 using Ringtoets.Integration.IO.Assembly;
+using Ringtoets.Integration.IO.Exceptions;
 
 namespace Ringtoets.Integration.IO.Creators
 {
@@ -38,6 +40,8 @@
         /// to create a <see cref="SerializableCombinedFailureMechanismSectionAssemblyResult"/> for.</param>
         /// <returns>A <see cref="SerializableCombinedFailureMechanismSectionAssemblyResult"/>.</returns>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="sectionResult"/> is <c>null</c>.</exception>
+        /// <exception cref="AssemblyCreatorException">Thrown when <paramref name="sectionResult"/> is invalid to create a
+        /// serializable counterpart for.</exception>
         public static SerializableCombinedFailureMechanismSectionAssemblyResult Create(ExportableFailureMechanismCombinedSectionAssemblyResult sectionResult)
         {
             if (sectionResult == null)
@@ -46,6 +50,11 @@
             }
 
             ExportableSectionAssemblyResult sectionResultSectionAssemblyResult = sectionResult.SectionAssemblyResult;
+            if (sectionResultSectionAssemblyResult.AssemblyCategory == FailureMechanismSectionAssemblyCategoryGroup.None)
+            {
+                throw new AssemblyCreatorException("The assembly result is invalid and cannot be created.");
+            }
+
             return new SerializableCombinedFailureMechanismSectionAssemblyResult(SerializableAssemblyMethodCreator.Create(sectionResultSectionAssemblyResult.AssemblyMethod),
                                                                                  SerializableFailureMechanismTypeCreator.Create(sectionResult.Code),
                                                                                  SerializableFailureMechanismSectionCategoryGroupCreator.Create(sectionResultSectionAssemblyResult.AssemblyCategory));
Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreatorTest.cs
===================================================================
diff -u -r7ad21c69dd74f12a4b17ff15217bf8c135cc06aa -r64bd60c5f92229044d3adf59d096a3b29f69ab4a
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreatorTest.cs	(.../SerializableCombinedFailureMechanismSectionAssemblyResultCreatorTest.cs)	(revision 7ad21c69dd74f12a4b17ff15217bf8c135cc06aa)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Creators/SerializableCombinedFailureMechanismSectionAssemblyResultCreatorTest.cs	(.../SerializableCombinedFailureMechanismSectionAssemblyResultCreatorTest.cs)	(revision 64bd60c5f92229044d3adf59d096a3b29f69ab4a)
@@ -26,6 +26,7 @@
 using Ringtoets.AssemblyTool.IO.Model.DataTypes;
 using Ringtoets.Integration.IO.Assembly;
 using Ringtoets.Integration.IO.Creators;
+using Ringtoets.Integration.IO.Exceptions;
 
 namespace Ringtoets.Integration.IO.Test.Creators
 {
@@ -65,6 +66,23 @@
                             serializableResult.CategoryGroup);
         }
 
+        [Test]
+        public void Create_WithSectionAssemblyResultNone_ThrowsAssemblyCreatorException()
+        {
+            // Setup
+            var random = new Random(21);
+            var sectionResult = new ExportableFailureMechanismCombinedSectionAssemblyResult(new ExportableSectionAssemblyResult(random.NextEnumValue<ExportableAssemblyMethod>(),
+                                                                                                                                FailureMechanismSectionAssemblyCategoryGroup.None),
+                                                                                            random.NextEnumValue<ExportableFailureMechanismType>());
+
+            // Call
+            TestDelegate call = () => SerializableCombinedFailureMechanismSectionAssemblyResultCreator.Create(sectionResult);
+
+            // Assert
+            var exception = Assert.Throws<AssemblyCreatorException>(call);
+            Assert.AreEqual("The assembly result is invalid and cannot be created.", exception.Message);
+        }
+
         private static ExportableSectionAssemblyResult CreateSectionAssemblyResult()
         {
             var random = new Random(21);