Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesOperational/OperationalCalculator.cs
===================================================================
diff -u -r1653 -r1660
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesOperational/OperationalCalculator.cs	(.../OperationalCalculator.cs)	(revision 1653)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesOperational/OperationalCalculator.cs	(.../OperationalCalculator.cs)	(revision 1660)
@@ -150,6 +150,10 @@
 
             // Perform the calculation
             Parallel.Run(operationalCalculatorTasks, RunOperationalCalculatorTask, null, damProjectData.MaxCalculationCores);
+            foreach (var operationalCalculatorTask in operationalCalculatorTasks)
+            {
+                damProjectData.CalculationMessages.AddRange(operationalCalculatorTask.CalculationMessages);
+            }
             damProjectData.OutputTimeSerieCollection = outputTimeSerieCollection;
         }