Hi Steph, I have no idea why 3676 should be different in this case, please double check. I assume your script to run mkgmap produces an invalid path for the --style-file option. If that doesn't help, please post a log that shows the executed command and the complete output to stdout. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Stéphane MARTIN <st3ph.martin@laposte.net> Gesendet: Sonntag, 25. Dezember 2016 21:12:31 An: Development list for mkgmap Betreff: [mkgmap-dev] "could not open style null…" with r3740 and r3734 Hi, I suddenly got an issue with r3740 and the the problem exists too with r3734 but not with r3676. This happened suddenly and I could not determine a wrong manipulation on my part. r3740 and r3734 produce the message: "Found one style in /home/steph/osm/styles/default/ could not open style null in /home/steph/osm/styles/default/ finished check-styles" With r3676, no problem: "Found one style in /home/steph/osm/styles/default/ finished check-styles" $ java -version openjdk version "1.8.0_111" OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-2ubuntu0.16.04.2-b14) OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode) An idea ? More information needed ? Best regards. Steph _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev