Why change drawing feature to convert from IGS to DXF file?

I have a IGS file of circles feature. I convert IGS to DXF in Solidworks. When I open DXF in AutoCAD, change shape of circle feature like line-line connect.

What to do for convert same as IGS as in DXF?

I attach IGS file.

Accepted answer

Strange things are going on here; maybe there are some unsupported data in the IGS-file? I imported the IGS-file into Solidworks, created a 3d-sketch, selected all curves, and used the Convert Entities-command. Then I extruded a short (1 mm) surface using the 3d-sketch with the front plane as directional input. I finally exported this surface as a DXF file and this has nice, smooth curves, please see attached...


1 Other answer

other option is using the igs file create a drawing with all views then export to dxf
this eliminate all lines opens autocad and delete thing that you don't need hope help..