We are getting this error when deleting the text in Combo Editor which trigers Value Changed and ItemNotinList event.

The following is the stack trace

"   at Infragistics.Win.EditorWithCombo.get_SelectedIndex()\r\n   at Infragistics.Win.EditorWithCombo.ProcessTextBoxTextChanged(Boolean& selectionChangedByAutoEdit)\r\n   at Infragistics.Win.EditorWithCombo.Infragistics.Win.IEmbeddableTextBoxListener.OnTextChanged()\r\n   at Infragistics.Win.EmbeddableTextBox.OnTextChanged(EventArgs e)\r\n   at System.Windows.Forms.TextBoxBase.WmReflectCommand(Message& m)\r\n   at System.Windows.Forms.TextBoxBase.WndProc(Message& m)\r\n   at System.Windows.Forms.TextBox.WndProc(Message& m)\r\n   at Infragistics.Win.EmbeddableTextBoxWithUIPermissions.WndProc(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)\r\n   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)\r\n   at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)\r\n   at System.Windows.Forms.Control.SendMessage(Int32 msg, IntPtr wparam, IntPtr lparam)\r\n   at System.Windows.Forms.Control.ReflectMessageInternal(IntPtr hWnd, Message& m)\r\n   at System.Windows.Forms.Control.WmCommand(Message& m)\r\n   at System.Windows.Forms.Control.WndProc(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)\r\n   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)\r\n   at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)\r\n   at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)\r\n   at System.Windows.Forms.Control.DefWndProc(Message& m)\r\n   at System.Windows.Forms.Control.WmKeyChar(Message& m)\r\n   at System.Windows.Forms.Control.WndProc(Message& m)\r\n   at System.Windows.Forms.TextBoxBase.WndProc(Message& m)\r\n   at System.Windows.Forms.TextBox.WndProc(Message& m)\r\n   at Infragistics.Win.EmbeddableTextBoxWithUIPermissions.WndProc(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)\r\n   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)\r\n   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)\r\n   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)\r\n   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)\r\n   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)\r\n   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)\r\n   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)\r\n   at System.Windows.Forms.Form.ShowDialog()\r\n   at
Program.Main() in \\Program.cs:line 257"

All your help will be greatly appreciated.