or
Browser.RefreshDomTree();var select = Browser.Find.ByAttributes<HtmlSelect>(attributes);select.MouseClick();Thread.Sleep(Extensions.SmallTimeOut);Browser.RefreshDomTree();select = Browser.Find.ByAttributes<HtmlSelect>(attributes);var option = select.Options.First(itm => itm.Text.Equals(value));option.Click();ActiveBrowser.NavigateTo("http://www.google.com");ActiveBrowser.Find.ByName<HtmlInputText>("q").Text = "telerik";ActiveBrowser.Find.ByName<HtmlButton>("btnK").Click();Exception occurs:ArtOfTest.WebAii.Exceptions.ExecuteCommandException : ExecuteCommand failed!InError set by the client. Client Error:mozCommandProcessor: A DOM click on the target element threw an error. TagName: BUTTON Err: TypeError: Value does not implement interface WindowProxy.BrowserCommand (Type:'Action',Info:'NotSet',Action:'Click',Target:'ElementId (tagName: 'button',occurrenceIndex: '1')',Data:'',ClientId:'8f9b7a8f-06cc-4edb-8ce9-d925a17e60bf',HasFrames:'False',FramesInfo:'',TargetFrameIndex:'-1',InError:'True',Response:'mozCommandProcessor: A DOM click on the target element threw an error. TagName: BUTTON Err: TypeError: Value does not implement interface WindowProxy.')InnerException: none.Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.---> System.Runtime.InteropServices.COMException: Object is not connected to server (Exception from HRESULT: 0x800401FD (CO_E_OBJNOTCONNECTED))10:39:52 at Accessibility.IAccessible.get_accChildCount()10:39:52 at MS.Internal.AutomationProxies.Accessible.GetChildCount(IAccessible acc)10:39:52 at MS.Internal.AutomationProxies.Accessible.GetChildren(IAccessible parent)10:39:52 at MS.Internal.AutomationProxies.Accessible.SetAccessibleChildrenIndexAndGetChildren(IAccessible parent)10:39:52 at MS.Internal.AutomationProxies.MsaaNativeProvider.System.Windows.Automation.Provider.IRawElementProviderFragment.GetRuntimeId()10:39:52 at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)10:39:52 at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)10:39:52 at MS.Internal.Automation.UiaCoreApi.CheckError(Int32 hr)10:39:52 at MS.Internal.Automation.UiaCoreApi.UiaNavigate(SafeNodeHandle hnode, NavigateDirection direction, Condition condition, UiaCacheRequest request)10:39:52 at System.Windows.Automation.AutomationElement.Navigate(NavigateDirection direction, Condition condition, CacheRequest request)10:39:52 at System.Windows.Automation.TreeWalker.GetFirstChild(AutomationElement element)10:39:52 at ArtOfTest.Common.Extensions.AutomationExtensions.GetControlChildrenCount(AutomationElement element)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.FirefoxConfirmDialogMatch..ctor(AutomationElement dialog)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.ConfirmDialog.MatchesUIAutomationElement(AutomationElement element)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.DialogMonitor.<>c__DisplayClass8.<FindUIAEDialog>b__5(IDialogUIAutomation d)10:39:52 at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.DialogMonitor.FindUIAEDialog(AutomationElement element)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.DialogMonitor.HandleElement(AutomationElement element)10:39:52 at ArtOfTest.WebAii.Win32.Dialogs.DialogMonitor.AutomationEvent_OnStructureChanged(Object sender, StructureChangedEventArgs e)10:39:52 --- End of inner exception stack trace ---10:39:52 at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)10:39:52 at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)10:39:52 at System.Delegate.DynamicInvokeImpl(Object[] args)10:39:52 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)10:39:52 at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)10:39:52 at System.Windows.Threading.DispatcherOperation.InvokeImpl()10:39:52 at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)10:39:52 at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)10:39:52 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)10:39:52 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)10:39:52 at System.Windows.Threading.DispatcherOperation.Invoke()10:39:52 at System.Windows.Threading.Dispatcher.ProcessQueue()10:39:52 at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)10:39:52 at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)10:39:52 at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)10:39:52 at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)10:39:52 at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)10:39:52 at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)10:39:52 at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)10:39:52 at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)10:39:52 at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)10:39:52 at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)10:39:52 at ArtOfTest.Common.DispatcherFactory.<>c__DisplayClass2.<CreateDispatcher>b__0()10:39:52 at System.Threading.ThreadHelper.ThreadStart_Context(Object state)10:39:52 at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)10:39:52 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)10:39:52 at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)10:39:52 at System.Threading.ThreadHelper.ThreadStart()