I am using Civil 3D 2009 for editing contours on a old drawing done in Land Desktop or possibly even R14. The contours objects are all AEC_CONTOURS, and I want to convert them to 2D polylines with elevations. In previous versions I remember doing this conversion by simply exploding these objects. I cannot find a way to convert them with this version. I downloaded the Object Enabler, still no luck. Any suggestions?
The AEC_CONTOURs look like contour lines but will not explode, no matter how many times I try, the message simply says "cannot explode AEC_CONTOUR. I cannot move or copy these objects, the only command I can find that works on them is ERASE. Only way I have found to deal with this so far is to trace the AEC_CONTOUR with a 2D polyline (which is a pain, as O-Snaps don't work on these objects, either).
This probably isn't overly helpful, but I was given a drawing with contour lines of the type "AECC_Contour" and a single explode function worked like a charm in Civil 3D 2009 to convert them to 2D polys w/ elevation. I then converted to 3D and added them to a new model as breaklines.