I am using AutoCAD Map 3D 2010. I have inserted my shp files of my points and a basemap that I use for ArcGIS. I can draw a polyline to connect my points and the polyline is visible and I save my map and close it down. But when I open the map again the polyline is not visible, selectable or anything. It will flash on the screen if i click the save button but then it disappears again. Does anyone know what the problem could be? It's driving me crazy!