I often use DXF files, exported from a SolidWorks Drawing. These are used to create the profiles of parts, to use for a CNC machine.

I use the Smartselect command to select the tangent lines and small profile lines that are from fillets in a DXF that I have exported from SolidWorks. The Tangent lines are all the phantom line type, so they can be chosen based on that. Then, there are small diagonal lines left over, which are profile lines. I can filter to select most of them based on their angle and length, which gets around 90% of them.

A macro to do the above two operations would be very helpful, but the Smartselect doesn't work with the command line.

In AutoCAD, there is the SSX command, but that is not available in Draftsight. Is there a command line version of SSX or Smartselect?