Hi What should this message say? I want to find out, what's going wrong here, but how can i identify the node, which node is wrong? This is the link to the splitter tile http://files.mkgmap.org.uk/download/436/65030009.o5m Bernd Time started: Fri Aug 31 10:51:04 CEST 2018 java.lang.AssertionError: Point marked as boundary node at 2353152/162997 not on boundary of [2353152, 151552, 2375680, 165888] at uk.me.parabola.mkgmap.general.LineClipper.clip(LineClipper.java: 168) at uk.me.parabola.mkgmap.general.LineClipper.clip(LineClipper.java: 105) at uk.me.parabola.mkgmap.general.LineClipper.clip(LineClipper.java:83) at uk.me.parabola.mkgmap.general.AreaClipper.clipLine(AreaClipper.java:46) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addLine(StyledConverter.java: 1179) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addLine(StyledConverter.java: 1165) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addLine(StyledConverter.java: 1137) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.end(StyledConverter.java:805) at uk.me.parabola.mkgmap.reader.osm.ElementSaver.convert(ElementSaver.java:241) at uk.me.parabola.mkgmap.reader.osm.OsmMapDataSource.load(OsmMapDataSource.java: 159) at uk.me.parabola.mkgmap.main.MapMaker.loadFromFile(MapMaker.java:154) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:52) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:290) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:286) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/ java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java: 1135) at java.base/ java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java: 635) at java.base/java.lang.Thread.run(Thread.java:844) Exiting - if you want to carry on regardless, use the --keep-going option