After some windows updates I have users who get an error message loading a drawing with a PDF in it. The error says "C:\Program Files\Autodesk\AutoCAD Civil 3D 2013\acdwfmarkupcore.crx cannot find a dll or other file that it needs." and the PDF's in that drawing come up as unloaded and won't reload. When trying to attach a file to these there is a invalid file message that pops up (see attached). Users are on Civil3D 2013 SP2. Users on SP1 don't seem to have the problem either. Neither do users on non updated OS (the update for win 7 when the win 8.1 update was released). Win7 ultimate x64 seems to be the only OS this is happening on. Is anyone familiar with this error?
Andrew Ingram
Civil 3D x64 2019
Win 10 x64 Pro
Intel Xeon E5-1620
32 GB Ram
![Autodesk Design & Make Report](https://forums.autodesk.com/t5/image/serverpage/image-id/1350519iCB55845EBFC43016/image-size/large?v=v2&px=999" "Autodesk Design & Make Report")
