Hi, I have just started getting an assert of "too many polylines at level 1" with my latest UK build. Any suggestions what I need to change? java.lang.AssertionError: too many polylines at level 1 at uk.me.parabola.imgfmt.app.net.RoadDef.writeLevelCount(RoadDef.java:333) at uk.me.parabola.imgfmt.app.net.RoadDef.writeNet1(RoadDef.java:228) at uk.me.parabola.imgfmt.app.net.NETFile.write(NETFile.java:67) at uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:314) 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:293) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:289) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Thanks, Mike