Index: DamClients/DamUI/trunk/src/Dam/Data/DamProjectData.cs
===================================================================
diff -u -r934 -r936
--- DamClients/DamUI/trunk/src/Dam/Data/DamProjectData.cs	(.../DamProjectData.cs)	(revision 934)
+++ DamClients/DamUI/trunk/src/Dam/Data/DamProjectData.cs	(.../DamProjectData.cs)	(revision 936)
@@ -183,7 +183,10 @@
         /// </summary>
         public void ClearResults()
         {
-            designCalculations.Clear();
+            if (designCalculations != null)
+            {
+                designCalculations.Clear();
+            }
             foreach (LocationJob locationJob in this.LocationJobs)
             {
                 locationJob.LocationResult = new LocationResult();
@@ -194,6 +197,9 @@
             }
         }
 
+        /// <summary>
+        /// Updates the calculations.
+        /// </summary>
         public void UpdateCalculations()
         {
             if (calculations != null)
Index: DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs
===================================================================
diff -u -r934 -r936
--- DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 934)
+++ DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 936)
@@ -690,6 +690,11 @@
 
         private void SetProperControlsAfterCalculation()
         {
+            if (damProject.DamProjectData.CalculationMessages != null && damProject.DamProjectData.CalculationMessages.Count > 0)
+            {
+                LogManager.Messages.AddRange(damProject.DamProjectData.CalculationMessages);
+                mainForm.Invoke(new PublisherDelegate(DataEventPublisher.DataListModified), LogManager.Messages, null);
+            }
             switch (damProject.DamProjectData.DamProjectType)
             {
                 case DamProjectType.Calamity: