Index: Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.IO.Test/Configurations/StabilityPointStructuresCalculationStochastAssignerTest.cs
===================================================================
diff -u -r65c74eaad22b576971bae588c9793d76950b8cad -r0bae0773243658d37a619b2904879e11c6aebe82
--- Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.IO.Test/Configurations/StabilityPointStructuresCalculationStochastAssignerTest.cs	(.../StabilityPointStructuresCalculationStochastAssignerTest.cs)	(revision 65c74eaad22b576971bae588c9793d76950b8cad)
+++ Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.IO.Test/Configurations/StabilityPointStructuresCalculationStochastAssignerTest.cs	(.../StabilityPointStructuresCalculationStochastAssignerTest.cs)	(revision 0bae0773243658d37a619b2904879e11c6aebe82)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using Core.Common.TestUtil;
 using NUnit.Framework;
 using Ringtoets.Common.Data.Structures;
 using Ringtoets.Common.IO.Configurations;
@@ -50,6 +51,82 @@
         }
 
         [Test]
+        [TestCase(true)]
+        [TestCase(false)]
+        public void Assign_WithSpreadForDrainCoefficient_LogsErrorReturnFalse(bool withStandardDeviation)
+        {
+            // Setup
+            var configuration = new StabilityPointStructuresCalculationConfiguration("name")
+            {
+                StructureName = "some structure"
+            };
+            configuration.DrainCoefficient = new StochastConfiguration();
+            configuration.DrainCoefficient.Mean = 8.1;
+            if (withStandardDeviation)
+            {
+                configuration.DrainCoefficient.StandardDeviation = 0.8;
+            }
+            else
+            {
+                configuration.DrainCoefficient.VariationCoefficient = 0.8;
+            }
+
+            var calculation = new StructuresCalculation<StabilityPointStructuresInput>();
+
+            var assigner = new StabilityPointStructuresCalculationStochastAssigner(
+                configuration,
+                calculation);
+
+            bool valid = true;
+
+            // Call
+            Action test = () => valid = assigner.Assign();
+
+            // Assert
+            var expectedMessage = "Er kan geen spreiding voor stochast 'afvoercoefficient' opgegeven worden. Berekening 'name' is overgeslagen.";
+            TestHelper.AssertLogMessageWithLevelIsGenerated(test, Tuple.Create(expectedMessage, LogLevelConstant.Error));
+            Assert.IsFalse(valid);
+        }
+
+        [Test]
+        [TestCase(true)]
+        [TestCase(false)]
+        public void Assign_WithSpreadForFlowVelocityStructureClosable_LogsErrorReturnFalse(bool withStandardDeviation)
+        {
+            // Setup
+            var configuration = new StabilityPointStructuresCalculationConfiguration("name")
+            {
+                StructureName = "some structure"
+            };
+            configuration.FlowVelocityStructureClosable = new StochastConfiguration();
+            configuration.FlowVelocityStructureClosable.Mean = 8.1;
+            if (withStandardDeviation)
+            {
+                configuration.FlowVelocityStructureClosable.StandardDeviation = 0.8;
+            }
+            else
+            {
+                configuration.FlowVelocityStructureClosable.VariationCoefficient = 0.8;
+            }
+
+            var calculation = new StructuresCalculation<StabilityPointStructuresInput>();
+
+            var assigner = new StabilityPointStructuresCalculationStochastAssigner(
+                configuration,
+                calculation);
+
+            bool valid = true;
+
+            // Call
+            Action test = () => valid = assigner.Assign();
+
+            // Assert
+            var expectedMessage = "Er kan geen spreiding voor stochast 'kritiekestroomsnelheid' opgegeven worden. Berekening 'name' is overgeslagen.";
+            TestHelper.AssertLogMessageWithLevelIsGenerated(test, Tuple.Create(expectedMessage, LogLevelConstant.Error));
+            Assert.IsFalse(valid);
+        }
+
+        [Test]
         public void Assign_WithAllStochastsSet_SetExpectedValuesOnInput()
         {
             // Setup