The error message says either the file C:\Program Files\Autodesk\Autocad oem…..”\toolkit\MKAoemBtn.vcxproj” is missing or I do not have permission to run it. The files is there. And I have set permissions for full control. Has anyone run into this?
This was an insufficient rights problem, make sure you have admin privilege and if needed lower the UAC level. Makesure the output locations for the build output are fully write enabled for the current user profile.
Unless you have specific reasons not to, stick with the default output location:
C:\Users\Default\Documents\AutoCAD OEM 2026

