diff --git a/SemanticData/AddressSpaceComplianceTestTool/App.config b/SemanticData/AddressSpaceComplianceTestTool/App.config
index 04bf4e1b..191cdcab 100644
--- a/SemanticData/AddressSpaceComplianceTestTool/App.config
+++ b/SemanticData/AddressSpaceComplianceTestTool/App.config
@@ -5,6 +5,7 @@
       <source name="AddressSpacePrototyping" switchValue="All" switchType="System.Diagnostics.SourceSwitch">
         <listeners>
           <add name="LogFile" />
+          <add name="WarningFile" />
           <add name="configConsoleListener" />
           <remove name="Default" />
         </listeners>
@@ -12,6 +13,7 @@
       <source name="UAModelDesignExport" switchValue="All" switchType="System.Diagnostics.SourceSwitch">
         <listeners>
           <add name="LogFile" />
+          <add name="WarningFile" />
           <add name="configConsoleListener" />
           <remove name="Default" />
         </listeners>
@@ -19,12 +21,16 @@
       <source name="UANodeSetValidation" switchValue="All" switchType="System.Diagnostics.SourceSwitch">
         <listeners>
           <add name="LogFile" />
+          <add name="WarningFile" />
           <add name="configConsoleListener" />
           <remove name="Default" />
         </listeners>
       </source>
     </sources>
     <sharedListeners>
+      <add name="WarningFile" type="System.Diagnostics.DelimitedListTraceListener" initializeData="asp.warnings.log" traceOutputOptions="DateTime">
+        <filter type="System.Diagnostics.EventTypeFilter" initializeData="Information" />
+      </add>
       <add name="LogFile" type="System.Diagnostics.DelimitedListTraceListener" initializeData="asp.log" traceOutputOptions="DateTime">
         <filter type="System.Diagnostics.EventTypeFilter" initializeData="All" />
       </add>
diff --git a/SemanticData/AddressSpaceComplianceTestTool/Program.cs b/SemanticData/AddressSpaceComplianceTestTool/Program.cs
index 4f19f414..427df96f 100644
--- a/SemanticData/AddressSpaceComplianceTestTool/Program.cs
+++ b/SemanticData/AddressSpaceComplianceTestTool/Program.cs
@@ -25,6 +25,7 @@ namespace UAOOI.SemanticData.AddressSpacePrototyping
   public class Program
   {
     #region public API
+
     public static void Main(string[] args)
     {
       Program program = new Program();
@@ -94,8 +95,9 @@ internal void Do(Options options, IAddressSpaceContext addressSpace)
       }
     }
 
-    internal ITraceSource DebugITraceSource { set => TraceSource = value; } 
-    #endregion
+    internal ITraceSource DebugITraceSource { set => TraceSource = value; }
+
+    #endregion public API
 
     #region private
 
@@ -114,7 +116,23 @@ private void Execute(string[] args)
 
     private async Task Heartbeat()
     {
-      await Task.Run(async () => { while (Running) { await Task.Delay(1000); Console.Write("."); } });
+      await Task.Run(async () =>
+      {
+        int counter = 0;
+        while (Running)
+        {
+          await Task.Delay(1000);
+          Console.Write("\r");
+          if (counter % 2 == 0 )
+            Console.Write(@"\");
+          else
+            Console.Write("/");
+          counter++;
+        }
+        TraceSource.TraceData(TraceEventType.Verbose, 918215642, $"Execution time = {counter}s");
+        Console.WriteLine();
+        Console.WriteLine($"Execution time = {counter}s");
+      });
     }
 
     private void HandleErrors(IEnumerable<Error> errors)
diff --git a/SemanticData/UANodeSetValidation/AddressSpaceContext.cs b/SemanticData/UANodeSetValidation/AddressSpaceContext.cs
index f137624d..10f52be9 100644
--- a/SemanticData/UANodeSetValidation/AddressSpaceContext.cs
+++ b/SemanticData/UANodeSetValidation/AddressSpaceContext.cs
@@ -82,7 +82,7 @@ Uri IAddressSpaceContext.ImportUANodeSet(FileInfo model)
     {
       if (model == null)
         throw new ArgumentNullException("model", "the model cannot be null");
-      m_TraceEvent.TraceData( TraceEventType.Information, 190380256, "Starting model import form file {model.Name}");
+      m_TraceEvent.TraceData( TraceEventType.Information, 190380256, $"Starting model import form file {model.Name}");
       if (!model.Exists)
         throw new FileNotFoundException("The imported file does not exist", model.FullName);
       UANodeSet _nodeSet = UANodeSet.ReadModelFile(model);
diff --git a/SemanticData/UANodeSetValidation/XML/UAModelContext.cs b/SemanticData/UANodeSetValidation/XML/UAModelContext.cs
index cb7c5421..9cd246c7 100644
--- a/SemanticData/UANodeSetValidation/XML/UAModelContext.cs
+++ b/SemanticData/UANodeSetValidation/XML/UAModelContext.cs
@@ -107,7 +107,7 @@ private UAModelContext(IUANodeSetModelHeader modelHeader, INamespaceTable addres
       if (modelHeader.ServerUris != null && modelHeader.ServerUris.Length > 0)
         traceEvent(TraceMessage.BuildErrorTraceMessage(BuildError.NotSupportedFeature, "ServerUris is omitted during the import"));
       if (modelHeader.Extensions != null && modelHeader.Extensions.Length > 0)
-        traceEvent(TraceMessage.BuildErrorTraceMessage(BuildError.NotSupportedFeature, "Extensions is omitted during the import"));
+        traceEvent(TraceMessage.BuildErrorTraceMessage(BuildError.NotSupportedFeature, "Extensions are omitted during the import"));
       _logTraceMessage = traceEvent ?? throw new ArgumentNullException(nameof(traceEvent));
       _addressSpaceContext = addressSpaceContext ?? throw new ArgumentNullException(nameof(addressSpaceContext));
     }