Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs
===================================================================
diff -u -r2025 -r2029
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs	(.../WtiPipingSellmeijerRevisedTests.cs)	(revision 2025)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs	(.../WtiPipingSellmeijerRevisedTests.cs)	(revision 2029)
@@ -1,8 +1,11 @@
 using System.IO;
+using System.Text;
 using Deltares.DamEngine.Data.General;
 using Deltares.DamEngine.Data.Geotechnics;
 using Deltares.DamEngine.Interface;
 using Deltares.DamEngine.Io;
+using Deltares.DamEngine.Io.XmlOutput;
+using Deltares.DamEngine.TestHelpers;
 using NUnit.Framework;
 
 namespace Deltares.DamEngine.IntegrationTests.IntegrationTests
@@ -164,5 +167,47 @@
             Assert.AreEqual(90.000, output.Results.CalculationResults.DesignResults[121].PipingDesignResults.Wti2017FactorOverall, tolerance);
         }
 
+        [Test]
+        // This test runs the same project as CanPerformmWtiDesignNoAdaptionRechterDiezedijk
+        // except that it runs it with both single core and multi core.
+        // The output of both runs must be the same
+        public void CompareResultFromMultiCoreRunWithSingleCoreRun()
+        {
+            var calcDir = "TestWtiPipingSingleCore";
+            var outputFileName = @"TestFiles\WtiPipingSingleCore.output.xml";
+            var output = RunTestProjectCores(calcDir, outputFileName, 1);
+            var outputSingleCore = DamXmlSerialization.SaveOutputAsXmlString(output);
+
+            calcDir = "TestWtiPipingMultiCore";
+            outputFileName = @"TestFiles\WtiPipingMultiCore.output.xml";
+            output = RunTestProjectCores(calcDir, outputFileName, 4);
+            var outputMultiCore = DamXmlSerialization.SaveOutputAsXmlString(output);
+
+            Assert.AreEqual(outputSingleCore, outputMultiCore);
+        }
+
+        private Output RunTestProjectCores(string calcDir, string outputFileName, int coreCount)
+        {
+            if (Directory.Exists(calcDir))
+            {
+                Directory.Delete(calcDir, true); // delete previous results
+            }
+
+            Directory.CreateDirectory(calcDir);
+
+            const string inputFileName = @"TestFiles\Rechter Diezedijk_WtiSellmeijerRevisedInputFile.xml";
+            string inputString = File.ReadAllText(inputFileName);
+            inputString = XmlAdapter.ChangeValueInXml(inputString, "ProjectPath", ""); // Current directory will be used
+            inputString = XmlAdapter.ChangeValueInXml(inputString, "CalculationMap", calcDir); // Current directory will be used
+            inputString = XmlAdapter.ChangeValueInXml(inputString, "MaxCalculationCores", coreCount.ToString());
+            EngineInterface engineInterface = new EngineInterface(inputString);
+            Assert.IsNotNull(engineInterface.DamProjectData);
+            string outputString = engineInterface.Run();
+            File.WriteAllText(outputFileName, outputString, Encoding.Unicode);
+            Assert.IsNotNull(outputString);
+            return DamXmlSerialization.LoadOutputFromXmlString(outputString);
+        }
+
     }
+
 }