Use the ClearLwPolyline command to examine each vertex of specified lightweight PolyLines and remove duplicate vertices from them.
Lightweight PolyLines are the default entity type for PolyLines. In new drawings, the PolyLine command creates optimized lightweight PolyLines. In older drawings non-lightweight PolyLines are converted by default when you open the drawing.
Note: With the DiscardDuplicates command, you can also:
To discard duplicate vertices from lightweight PolyLines:
A message reports the number of duplicate vertices that were removed.
Access
Command: ClearLwPolyline