The dxf does not have a rectangle in it.
The bottom is a closed polyline, (starts at point A and ends at point B, then is closed back to point A) A closed single line may be an issue when opened in Rhino.
and the left, top and right are one open polyline.
I just noticed that this had come from Vectorworks - phenomenally bad software for for good dwg or dxf files.
@pascal
I have done various tests using AutoCAD 2015 with dwg and dxf and if we have any single segment polyline, and it becomes closed it is omitted when a file is opened (Rhino 5 SR8 64).
I come across various files from other programs that do produce such closed single polylines so should be looked at as being a possible issue.
Hi Barry- sorry for the delay- so the workflow is, create a polyline in Autocad that has one segment, and export to dwg/dxf and open this file in Rhino 5, correct?
Hi Pascal.
Yes, but that one segment needs to be ‘closed’.
In AutoCAD, if you have a single polyline segment and then in the properties panel select the ‘closed’ option, it becomes a polyline that starts at point A and ends at point B, and then closes back to point A.
If this was exploded, it becomes two duplicate lines.
In Jiskar’s file above, the bottom ‘line’ of the rectangle is a single segment closed polyline. This file opens with everything in AutoCAD, but the bottom segment is missing in Rhino.
I have found these in both Vectorworks and Visio files I have received over the years.