Index: DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs
===================================================================
diff -u -r6356 -r6385
--- DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 6356)
+++ DamClients/DamUI/trunk/src/Dam/Forms/DamPlugin.cs	(.../DamPlugin.cs)	(revision 6385)
@@ -238,7 +238,9 @@
 
             // This is to force the version type (Alpha, Pre-Alpha etc.) to be updated 
             mainForm.ReloadManager.ApplyCurrentUiCultureToAll();
-            MaxCalculationCores = Math.Max(Environment.ProcessorCount - 1, 1);
+            // Set number of cores to 1 because multicore gives errors.
+            MaxCalculationCores = 1; //  Math.Max(Environment.ProcessorCount - 1, 1);
+            mainForm.ProgramSettings.AllowMultiCoreSelection = false;
         }
 
         public void Assign(object source)
@@ -958,7 +960,8 @@
 
                 if (e.Property != null && e.Property.Equals("MaxCalculationCores"))
                 {
-                    mainForm.MaxCalculationCores = Math.Min(Environment.ProcessorCount - 1, damProject.DamProjectData.MaxCalculationCores);
+                    // Set number of cores to 1 because multicore gives errors.
+                    mainForm.MaxCalculationCores = 1; // Math.Min(Environment.ProcessorCount - 1, damProject.DamProjectData.MaxCalculationCores);
                 }
             }
             else if (sender == damProject.DamProjectData.WaterBoard)