timer problem - System.InvalidOperationException: Handle is not initialized.

[Paul]

I have no idea why this error keeps cropping up randomly on some client
machines. Is there a bug in the timer class?

Paul

System.InvalidOperationException: Handle is not initialized.
at System.Runtime.InteropServices.GCHandle.Free()
at System.Windows.Forms.Timer.set_Enabled(Boolean value)
at C1.Win.C1FlexGrid.0J.BY()
at C1.Win.C1FlexGrid.0J.BU(MouseEventArgs 0HK)
at C1.Win.C1FlexGrid.C1FlexGridBase.OnMouseUp(MouseEv entArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons
button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at C1.Win.C1FlexGrid.Util.BaseControls.ScrollableCont rol.WndProc(Message&
m)
at System.Windows.Forms.ControlNativeWindow.OnMessage (Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(M essage& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)