2d polyline to polyline

[jaychandran]

how to convert the 2d polyline to polyline.

[rkmcswain]

how to convert the 2d polyline to polyline.

Please define more clearly the terms you used.
Is "2d polyline" a LWPolyline?
The answer may possibly be the command: Convertpoly

ref: http://bit.ly/17MyeIZ

[Coloradomrg]

2d polylines are legacy objects or are from drawings created with programs other than AutoCAD I believe. The command "convert" will make them current objects, although I'm not exactly sure they become polylines. This command will also convert old hatch patterns.