geometry does not admit tolerance…
here the board with emn, emp files from IDF export
CEAV0030b-closed-edge.zip (71.2 KB)
and the board edge in FreeCAD
and if you use kicad StepUp script, the board with assemblies
(I included only some parts, just to show you the result)
You could file a bug in launchpad to ask for improving the IDF exporting, checking for close points in case of non closed path… something similar has been done for 3d-rendering…
In FreeCAD there is a Validate function to check if a path is closed, but FC is a MCAD oriented sw…
Maurice