Hi Ticket, I found another problem in the branch which probably was introduced with r3779 and still exists with r3782: java.lang.AssertionError at uk.me.parabola.imgfmt.app.net.RoadIndex.write(RoadIndex.java:45) at uk.me.parabola.imgfmt.app.net.RoadDef.writeLevelDivs(RoadDef.java:361) at uk.me.parabola.imgfmt.app.net.RoadDef.writeNet1(RoadDef.java:230) at uk.me.parabola.imgfmt.app.net.NETFile.write(NETFile.java:66) at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:263) 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:265) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:261) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) See http://files.mkgmap.org.uk/download/331/63240003.osm.pbf Needed options to reproduce the error with r3782: java -ea -jar mkgmap.jar --link-pois-to-ways --route 63240003.osm.pbf For r3779 these options will not create a crash, but with options --bounds=f:\osm\bounds.zip --route --link-pois-to-ways I see it, too. My bounds.zip is quite new, it contains version.txt wih content 20170103. Gerd