I am getting this exception when opening the step screen. Any fix in the meantime? Ive tried reinstalling the application. This is after i updated to latest release 2017.3.1010.0 { "utcdate": "2017-10-20 11:01:02,059", "thread": "1", "level": "ERROR", "logger": "Telerik.ApiTesting.Logging.Logger", "code": "(null)", "message": "CurrentDomain.UnhandledException", "exception": " Type: System.Windows.Markup.XamlParseException,Message: Could not load file or assembly 'Telerik.TestingFramework.Interop, PublicKeyToken=8ca00d3e0ebd4b8b' or one of its dependencies. The system cannot find the file specified.,Source: PresentationFramework,TargetSite: System.Object Load(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri),Data: System.Object: , , StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri); at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri); at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream); at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator); at Telerik.ApiTesting.UI.StepExplorer.InitializeComponent(); at Telerik.ApiTesting.UI.StepExplorer..ctor(TestStepModel step); at Telerik.ApiTesting.MainWindowController.CreateContentControl(IRuntimeItemModel itemModel); at Telerik.ApiTesting.MainWindowController.OpenItem(Object item); at Telerik.ApiTesting.MainWindowController.OpenItems(IEnumerable items); at Telerik.ApiTesting.MainWindowController.CommandExecuted(Object sender, ExecutedRoutedEventArgs e); at Telerik.ApiTesting.App.CommandExecuted(Object sender, ExecutedRoutedEventArgs e); at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e); at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding); at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute); at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e); at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e); at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target); at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target); at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs); at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised); at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args); at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted); at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated); at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target); at Telerik.ApiTesting.UI.TestExplorer.StepsGridRowMouseDoubleClick(Object sender, MouseButtonEventArgs e); at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget); at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target); at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs); at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised); at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args); at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e); at Telerik.Windows.Controls.GridView.GridViewRow.OnMouseDoubleClick(MouseButtonEventArgs e); at System.Windows.Controls.Control.HandleDoubleClick(Object sender, MouseButtonEventArgs e); at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget); at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target); at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs); at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised); at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent); at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e); at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget); at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target); at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs); at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised); at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args); at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args); at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted); at System.Windows.Input.InputManager.ProcessStagingArea(); at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input); at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport); at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel); at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled); at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled); at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled); at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o); at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs); at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler); at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs); at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam); at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg); at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame); at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame); at System.Windows.Application.RunDispatcher(Object ignore); at System.Windows.Application.RunInternal(Window window); at System.Windows.Application.Run(Window window); at Telerik.ApiTesting.App.Main(); Type: System.IO.FileNotFoundException,Message: Could not load file or assembly 'Telerik.TestingFramework.Interop, PublicKeyToken=8ca00d3e0ebd4b8b' or one of its dependencies. The system cannot find the file specified.,Source: mscorlib,TargetSite: System.Reflection.RuntimeAssembly _nLoad(System.Reflection.AssemblyName, System.String, System.Security.Policy.Evidence, System.Reflection.RuntimeAssembly, System.Threading.StackCrawlMark ByRef, IntPtr, Boolean, Boolean, Boolean),Data: , StackTrace: at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks); at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks); at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks); at System.Reflection.Assembly.Load(AssemblyName assemblyRef); at System.Windows.Baml2006.Baml2006SchemaContext.ResolveAssembly(BamlAssembly bamlAssembly); at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlTypeToType(BamlType bamlType); at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlType(BamlType bamlType, Int16 typeId); at System.Windows.Baml2006.Baml2006SchemaContext.GetXamlType(Int16 typeId); at System.Windows.Baml2006.Baml2006Reader.Process_ElementStart(); at System.Windows.Baml2006.Baml2006Reader.Process_OneBamlRecord(); at System.Windows.Baml2006.Baml2006Reader.Process_BamlRecords(); at System.Windows.Baml2006.Baml2006Reader.Read(); at System.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReader xamlReader, XamlObjectWriter xamlWriter, Boolean onlyLoadOneNode, Boolean skipJournaledProperties, Boolean shouldPassLineNumberInfo, IXamlLineInfo xamlLineInfo, IXamlLineInfoConsumer xamlLineInfoConsumer, XamlContextStack`1 stack, IStyleConnector styleConnector); at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) "} System.Windows.Markup.XamlParseException: Could not load file or assembly 'Telerik.TestingFramework.Interop, PublicKeyToken=8ca00d3e0ebd4b8b' or one of its dependencies. The system cannot find the file specified. ---> System.IO.FileNotFoundException: Could not load file or assembly 'Telerik.TestingFramework.Interop, PublicKeyToken=8ca00d3e0ebd4b8b' or one of its dependencies. The system cannot find the file specified. at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveAssembly(BamlAssembly bamlAssembly) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlTypeToType(BamlType bamlType) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlType(BamlType bamlType, Int16 typeId) at System.Windows.Baml2006.Baml2006SchemaContext.GetXamlType(Int16 typeId) at System.Windows.Baml2006.Baml2006Reader.Process_ElementStart() at System.Windows.Baml2006.Baml2006Reader.Process_OneBamlRecord() at System.Windows.Baml2006.Baml2006Reader.Process_BamlRecords() at System.Windows.Baml2006.Baml2006Reader.Read() at System.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReader xamlReader, XamlObjectWriter xamlWriter, Boolean onlyLoadOneNode, Boolean skipJournaledProperties, Boolean shouldPassLineNumberInfo, IXamlLineInfo xamlLineInfo, IXamlLineInfoConsumer xamlLineInfoConsumer, XamlContextStack`1 stack, IStyleConnector styleConnector) at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) --- End of inner exception stack trace --- at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator) at Telerik.ApiTesting.UI.StepExplorer.InitializeComponent() at Telerik.ApiTesting.UI.StepExplorer..ctor(TestStepModel step) at Telerik.ApiTesting.MainWindowController.CreateContentControl(IRuntimeItemModel itemModel) at Telerik.ApiTesting.MainWindowController.OpenItem(Object item) at Telerik.ApiTesting.MainWindowController.OpenItems(IEnumerable items) at Telerik.ApiTesting.MainWindowController.CommandExecuted(Object sender, ExecutedRoutedEventArgs e) at Telerik.ApiTesting.App.CommandExecuted(Object sender, ExecutedRoutedEventArgs e) at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e) at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding) at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute) at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e) at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e) at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated) at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target) at Telerik.ApiTesting.UI.TestExplorer.StepsGridRowMouseDoubleClick(Object sender, MouseButtonEventArgs e) at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at Telerik.Windows.Controls.GridView.GridViewRow.OnMouseDoubleClick(MouseButtonEventArgs e) at System.Windows.Controls.Control.HandleDoubleClick(Object sender, MouseButtonEventArgs e) at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent) at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e) at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input) at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport) at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler) at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at Telerik.ApiTesting.App.Main() { "utcdate": "2017-10-20 11:22:40,160", "thread": "1", "level": "INFO ", "logger": "Telerik.ApiTesting.Logging.Logger", "code": "(null)", "message": "Application started 20/10/2017 13:22:40", "exception": " "}