[NTG-context] Printer requires vectorised contour path for cut contour

Hi! I created a non-rectangular shaped document. The printer requires a cut contour in a particular colour, no problem so far. However, he complained about a missing “single continuous closed vectorised contour path”. The one I provided is an area, not a contour path. I created the path as follows: \starttext \startMPcode draw origin -- (50mm, 0mm) -- (60mm, 20mm) -- (10mm, 20mm) -- origin; \stopMPcode \stoptext Any clue how to create such a vectorised contour path? Marco