Index: dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs
===================================================================
diff -u -r501 -r520
--- dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs	(.../EngineInterface.cs)	(revision 501)
+++ dam engine/trunk/src/Deltares.DamEngine.Interface/EngineInterface.cs	(.../EngineInterface.cs)	(revision 520)
@@ -30,6 +30,9 @@
 
 namespace Deltares.DamEngine.Interface
 {
+    /// <summary>
+    /// The main interface class for accessing the Dam Engine
+    /// </summary>
     public class EngineInterface
     {
         private ProgressDelegate progressDelegate;
@@ -39,7 +42,7 @@
         /// <summary>
         /// Initializes a new instance of the <see cref="EngineInterface"/> class.
         /// </summary>
-        /// <param name="modelInput">The model input.</param>
+        /// <param name="modelInput">Xml string containing the model input.</param>
         public EngineInterface(string modelInput)
         {
             if (String.IsNullOrEmpty(modelInput))
@@ -150,9 +153,10 @@
         /// <summary>
         /// Runs this instance.
         /// </summary>
-        /// <returns>Errors and warnings in an XML string</returns>
-        public string Run(out string outputXml)
+        /// <returns>Returns the output in an XML string</returns>
+        public string Run()
         {
+            string outputXml;
             SendMessage(new LogMessage() { MessageType = LogMessageType.Info, Message = "Start calculation" });
 
             switch (DamProjectData.DamProjectType)