Hi Steph, the log doesn't show any failure. Similar arcs are quite normal even with the default style. What makes you think that mkgmap failed? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Stéphane MARTIN <Stephma@protonmail.com> Gesendet: Dienstag, 28. September 2021 07:39 An: Development list for mkgmap Betreff: [mkgmap-dev] Compilation fail with "Similar arcs" Hi, - splitter-r642 - mkgmap-r4807 mkgmap fails compiling Madagascar map with extract from Geofabrik. mkgmap.log : https://files.mkgmap.org.uk/download/521/mkgmap.log More informations needed ? Regards Steph _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk https://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev