Dear all, I tried to define a patchwork using its dual subdivision, as shown at the end of the tutorial https://polymake.org/doku.php/user_guide/tutorials/patchwork . My code is as follows : my $dual_sub = new fan::SubdivisionOfPoints(POINTS=>[[1, 2, 0, 0],[1, 1, 0, 1],[1, 0, 0, 2],[1, 1, 1, 0],[1, ...