I have curved parts originally generated by SMA. Please explain why Microvellum clips the corner of a rabbet I added later.  We will use a 1/2" dia router, so when creating the tool path, I want the path to extend at least 1/4" past the part outline.  This pushes outside the border a little more than 1/4" proud of the yellow 'border'.  Red dashed lines added to show the 1/4" offset of border and routed part outline.

This little clipped segment causes our machine to fail because the tooling can't hit it: