Unhandled e0434f4dh Exception at

Odpowiedź jest tu:

https://forums.autodesk.com/t5/autocad-2010-2011-2012/fatal-error-unhandled-e0434f4dh-exception-at-7c812a5bh/td-p/2679375

W skrócie:

I ultimately traced it down to this single registry key:
[HKEY_CURRENT_USER\Software\autodesk\AutoCAD\R18.0\ACAD-8000:409\WebServices\CommunicationCenter]@=”””LastUpdateTimeLoWord”=dword:4be447d0

Changing the dword to 00000000 solved the problem.