- Certain XREFs simply won't bind
- Locked COGO points can't be exploded so the conversion fails
- Contour labels become MTEXT with a black hatch behind them instead of a mask.
- The export simply fails
- The resulting file is missing stuff
I've seen cases where converting a few Civil 3D drawings has taken hours because the user had to manually open each drawing, explode everything, bind everything, and so on.
So...what do you do? Have you been able to come up with a workflow that is reliable? What kinds of problems do you consistently run into?