wpf - The specified Visual is not a descendant of this Visual Exception -

i getting "specified visual not descendant of visual" exception.

can please on scenarios exception stacktrace not helping me identify issue?

stack-trace:

at system.windows.media.visual.trysimpletransformtoancestor(visual ancestor, boolean inverse, generaltransform& generaltransform, matrix& simpletransform) @ system.windows.media.visual.internaltransformtoancestor(visual ancestor, boolean inverse) @ system.windows.window.handlewmnchittestmsg(intptr lparam, intptr& refint) @ system.windows.window.windowfiltermessage(intptr hwnd, int32 msg, intptr wparam, intptr lparam, boolean& handled) @ system.windows.interop.hwndsource.publichooksfiltermessage(intptr hwnd, int32 msg, intptr wparam, intptr lparam, boolean& handled) @ ms.win32.hwndwrapper.wndproc(intptr hwnd, int32 msg, intptr wparam, intptr lparam, boolean& handled) @ ms.win32.hwndsubclass.dispatchercallbackoperation(object o) @ system.windows.threading.exceptionwrapper.internalrealcall(delegate callback, object args, int32 numargs) @ ms.internal.threading.exceptionfilterhelper.trycatchwhen(object source, delegate method, object args, int32 numargs, delegate catchhandler)