diff --git a/VisualPascalABCNET/DockContent/ErrorsListWindowForm.cs b/VisualPascalABCNET/DockContent/ErrorsListWindowForm.cs
index 0430b61c8..45eb9f14e 100644
--- a/VisualPascalABCNET/DockContent/ErrorsListWindowForm.cs
+++ b/VisualPascalABCNET/DockContent/ErrorsListWindowForm.cs
@@ -115,10 +115,12 @@ namespace VisualPascalABC
                         lvErrorsList.Items[i].SubItems[ErrorListLineCol].Text = er.SourceLocation.BeginPosition.Line.ToString();
                     }
                 }
-                if (Err is PascalABCCompiler.Errors.CompilerInternalError)
+                else if (Err is PascalABCCompiler.Errors.CompilerInternalError)
                 {
                     lvErrorsList.Items[i].SubItems[ErrorListDescrCol].Text = (Err as PascalABCCompiler.Errors.CompilerInternalError).ToString();
                 }
+                else
+                    lvErrorsList.Items[i].SubItems[ErrorListDescrCol].Text = Err.Message;
                 i++;
             }
             if (ErrorsList.Count > 0 && !(ErrorsList[0] is PascalABCCompiler.Errors.CompilerWarning))
diff --git a/VisualPlugins/PT4Provider/PT4Provider.csproj b/VisualPlugins/PT4Provider/PT4Provider.csproj
index e608b0019..83462c494 100644
--- a/VisualPlugins/PT4Provider/PT4Provider.csproj
+++ b/VisualPlugins/PT4Provider/PT4Provider.csproj
@@ -106,6 +106,10 @@
       <Project>{1E42361A-EDA3-4872-88AF-A3AAF600D36D}</Project>
       <Name>Compiler</Name>
     </ProjectReference>
+    <ProjectReference Include="..\..\Errors\Errors.csproj">
+      <Project>{44a01f9e-dce7-470c-aae5-c3de0ccbee3b}</Project>
+      <Name>Errors</Name>
+    </ProjectReference>
     <ProjectReference Include="..\..\Localization\Localization.csproj">
       <Project>{2DE2842F-0912-4251-BC0F-480854C44A13}</Project>
       <Name>Localization</Name>
diff --git a/VisualPlugins/PT4Provider/PT4ProviderPlugin.cs b/VisualPlugins/PT4Provider/PT4ProviderPlugin.cs
index bfde34adc..e21247204 100644
--- a/VisualPlugins/PT4Provider/PT4ProviderPlugin.cs
+++ b/VisualPlugins/PT4Provider/PT4ProviderPlugin.cs
@@ -142,7 +142,15 @@ namespace VisualPascalABCPlugins
             pt4setup.StartInfo.FileName = PT4Dir + "\\PT4Setup.exe";
 
             if (System.IO.File.Exists(pt4setup.StartInfo.FileName))
-                pt4setup.Start();
+                try
+                {
+                    pt4setup.Start();
+                }
+                catch(Exception ex)
+                {
+                    VisualEnvironmentCompiler.ExecuteAction(VisualEnvironmentCompilerAction.AddMessageToErrorListWindow, 
+                    new List<PascalABCCompiler.Errors.Error>(new PascalABCCompiler.Errors.Error[] { new PascalABCCompiler.Errors.Error(ex.Message) }));
+                }
         }
         public void GetGUI(List<IPluginGUIItem> MenuItems, List<IPluginGUIItem> ToolBarItems)
         {