Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableFailureMechanismSectionAssembly.cs
===================================================================
diff -u -r5e2248b589fcb4b39e7ff664cd11a200b08daa28 -ra30b67748bed77736f62b6b3c30c82649bb9cf4e
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableFailureMechanismSectionAssembly.cs	(.../SerializableFailureMechanismSectionAssembly.cs)	(revision 5e2248b589fcb4b39e7ff664cd11a200b08daa28)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableFailureMechanismSectionAssembly.cs	(.../SerializableFailureMechanismSectionAssembly.cs)	(revision a30b67748bed77736f62b6b3c30c82649bb9cf4e)
@@ -44,16 +44,17 @@
         /// <param name="section">The section this assembly belongs to.</param>
         /// <param name="sectionResults">The collection of assembly results for this section assembly.</param>
         /// <param name="combinedSectionResult">The combined assembly result for this section assembly.</param>
-        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="id"/> is <c>null</c> or empty.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter except <paramref name="id"/> is <c>null</c>.</exception>
         public SerializableFailureMechanismSectionAssembly(string id,
                                                            SerializableFailureMechanism failureMechanism,
                                                            SerializableFailureMechanismSection section,
                                                            SerializableFailureMechanismSectionAssemblyResult[] sectionResults,
                                                            SerializableFailureMechanismSectionAssemblyResult combinedSectionResult) : this()
         {
-            if (id == null)
+            if (string.IsNullOrEmpty(id))
             {
-                throw new ArgumentNullException(nameof(id));
+                throw new ArgumentException($@"'{nameof(id)}' must have a value.");
             }
 
             if (failureMechanism == null)