Routing / Nesting system parameter to set whether we use a closed contour as the part border if no border exists in the MPR(X) Part.
If checked then an MPR(X) part with no border defined but containing a closed contour around the part outline will be used as the part border.
Use largest closed contour for border
If this is not checked, then closed contours will not be used as the border for MPR(X) parts without part borders.
This parameter can only be switched off if Use ProjectX manager is set.