Index: dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs
===================================================================
diff -u -r669 -r694
--- dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs	(.../EngineInterface.cs)	(revision 669)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs	(.../EngineInterface.cs)	(revision 694)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using Deltares.DamEngine.Calculators.Dikes_Design;
 using Deltares.DamEngine.Data.General;
 using Deltares.DamEngine.Data.Standard;
@@ -159,6 +160,7 @@
             string outputXml;
             SendMessage(new LogMessage() { MessageType = LogMessageType.Info, Message = "Start calculation" });
 
+            List<LogMessage> calculationMessages;
             switch (DamProjectData.DamProjectType)
             {
                 case DamProjectType.Assessment:
@@ -168,7 +170,7 @@
                 case DamProjectType.Design:
                     DesignCalculator designCalculator = new DesignCalculator();
 
-                    designCalculator.Execute(DamProjectData);
+                    calculationMessages = designCalculator.Execute(DamProjectData);
                     break;
             }
             Output output = FillXmlOutputFromDam.CreateOutput(DamProjectData);