Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculatorSingle.cs
===================================================================
diff -u -r4689 -r4732
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculatorSingle.cs	(.../DesignCalculatorSingle.cs)	(revision 4689)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/DikesDesign/DesignCalculatorSingle.cs	(.../DesignCalculatorSingle.cs)	(revision 4732)
@@ -76,7 +76,7 @@
                 // Perform calculation
                 kernelWrapper.Execute(kernelDataInput, kernelDataOutput, out locationCalculationMessages);
             }
-            bool hasError = locationCalculationMessages.Any(message => message.MessageType == LogMessageType.Error);
+            bool hasError = locationCalculationMessages.Exists(message => message.MessageType == LogMessageType.Error);
             designScenario.CalculationResult = hasError ? CalculationResult.RunFailed : CalculationResult.Succeeded;
             // Process output
             calculationMessages.AddRange(locationCalculationMessages);