Docking Manager Exception

Hi,
We are getting the below exception when clicked on a button which is using Docking Manager for navigation of windows.

Object reference not set to an instance of an object.

Target Site :
Syncfusion.Windows.Forms.Tools.DockHostController, Syncfusion.Tools.Windows, Version=4.202.0.37, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89

Stack Trace:
at Syncfusion.Windows.Forms.Tools.DockHostController.ExitFloatingFrame()
at Syncfusion.Windows.Forms.Tools.DockHostController.TransitToPrevDock()
at Syncfusion.Windows.Forms.Tools.WhidbeyDragProvider.TransitToPrevDock(IDraggable ctrl)
at Syncfusion.Windows.Forms.Tools.WhidbeyDragProvider.ProcessMouseUp(DockControllerBase controller, IDraggable ctrl, Point ptscreen)
at Syncfusion.Windows.Forms.Tools.DockHostController.HandleMouseUpImp(MouseButtons button, Point pt)
at Syncfusion.Windows.Forms.Tools.DockHost.OnMouseUp(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at Syncfusion.Windows.Forms.Tools.DockHost.WndProc(Message& msg)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


Please help me regarding this.
Thanks in advance.
Annie

Hi Annie,

Thank you for your interest in Syncfusion Products.

I have tested this issue with a simple sample[assembly version 4.202.0.37]. I am afraid that I was not able to reproduce the issue. Please refer to the following simple sample in which I have tested this issue:

http://websamples.syncfusion.com/samples/Tools.Windows/F77088/Tools_WF_WindowFill.zip

Please try the above sample, if I am missing anything, could you please modify and send the sample, so that I could trace out the cause of the issue and provide you the better solution at the earliest?

Please let me know if any concerns.

Regards,
Hema