Hi, with mkgmap r3736 I get: java.lang.NullPointerException at uk.me.parabola.mkgmap.build.MapArea.split(MapArea.java:241) at uk.me.parabola.mkgmap.build.MapSplitter.splitMaxSize(MapSplitter.java:239) at uk.me.parabola.mkgmap.build.MapSplitter.split(MapSplitter.java:104) at uk.me.parabola.mkgmap.build.MapBuilder.makeMapAreas(MapBuilder.java:696) at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:232) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:107) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:69) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:259) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:255) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Exiting - if you want to carry on regardless, use the --keep-going option Number of ExitExceptions: 1 That map has a lot of empty space and tiles and only a few POI in some of the tiles. Thorsten -- Thorsten Kukuk, Distinguished Engineer, Senior Architect SLES & CASP SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nuernberg, Germany GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nuernberg)