http://bugs.winehq.org/show_bug.cgi?id=58043
--- Comment #2 from Alex Henrie alexhenrie24@gmail.com --- Adding a non-existent function that starts with "Zw" to ntdll.spec, for example "@stub ZwFoobar", also triggers the error. That makes me think that DVDFab is looking at all ntdll functions that start with "Zw" and checking them for something. I still don't know what exactly it doesn't like about ZwAllocateReserveObject and ZwCallbackReturn though.