Unwanted curves after export to DXF

[Hanysek22011275oivp]

Hello,

I have a a patern which when i export to DXF or DWG it create some artifacts and I dont know why?

 the bottom one is the shape and the top one is created after export, its like double lines.

[kevin stohlmeyer]

It appears to me the DXF is expanding your shapes which causes multiple instances.

In this case it is outlining the grey path and the white fill inside - hence two paths.

It can't account for compound paths either.

In order for this to work properly you should expand a compound path, then have a solid gray rectangle (no holes) and overlay the white filled objects to create the same appearance but with one path.