[Vol-users] Why is the address of this tagWND unreadable?

Hi all, I feel like I'm missing something obvious. Consider the following from volshell. Profile is Win10x64 in case it matters; I'd already imported messagehooks (mh). Current context: System @ 0xffffe00012a61840, pid=4, ppid=0 DTB=0x1aa000 ... for desktop in winsta.desktops(): ... for wnd, _level in desktop.windows(desktop.DeskInfo.spwnd): ... if wnd.cbwndExtra == 8: ... break [tagWND spwndNext] @ 0xFFFFF90140A04AD0 [tagWND spwndNext] @ 0xFFFFF90140A04AD0 0x0 : head 18446736382507371216 0x28 : bActiveFrame 0 0x28 : bAnsiCreator 0 --SNIP-- 0x120 : bLinked 1 0x120 : bRedirectedForPrint 0 0x120 : bVerticallyMaximizedLeft 0 0x120 : bVerticallyMaximizedRight 0 ERROR: could not instantiate object Reason: Invalid Address 0xFFFFF90140A04AD0, instantiating tagWND '0xfffff90140a04ad0L' Memory unreadable at fffff90140a04ad0 Why is the memory address unreadable? Is my error in assuming that object 'wnd' is made up of bytes located at 0xFFFFF90140A04AD0? Given the address is in Kernel space, I should be able to access it right? Any pointers appreciated! (Pardon the pun.) Adam