Caught it ! I targeted the EMP file as the EMN one was opening correctly.
in your altium file you have doubled the outline edge (you have drawn the edge twice on the same outline)
Indeed there is a similar issue now in your EMN file : This is due to the way your ECAD software exports the 2 successive arcs of the board outline.
Code: Select all
cut -d " " -f 2-3 YOUR_FILE | uniq -d