I still get this message in mkgmap when processing data that was created with splitter r275 and --precomp-sea option. It seems that it is not sufficient to count the nodes in the precompiled sea data, which leads me to the assumption that this is a general problem with polygons. I don't know what else we could do to handle this problem :-) I've added a few lines of code to get a stacktrace (see attached patch): uk.me.parabola.imgfmt.app.BufferedImgFileWriter.ensureSize(BufferedImgFileWriter.java:197) uk.me.parabola.imgfmt.app.BufferedImgFileWriter.put(BufferedImgFileWriter.java:160) uk.me.parabola.imgfmt.app.trergn.Polyline.write(Polyline.java:145) uk.me.parabola.imgfmt.app.trergn.RGNFile.addMapObject(RGNFile.java:140) uk.me.parabola.imgfmt.app.map.Map.addMapObject(Map.java:242) uk.me.parabola.mkgmap.build.MapBuilder$ShapeAddFilter.doFilter(MapBuilder.java:1156) uk.me.parabola.mkgmap.build.LayerFilterChain.doFilter(LayerFilterChain.java:57) uk.me.parabola.mkgmap.build.LayerFilterChain.addElement(LayerFilterChain.java:66) uk.me.parabola.mkgmap.filters.PolygonSplitterFilter.doFilter(PolygonSplitterFilter.java:88) uk.me.parabola.mkgmap.build.LayerFilterChain.doFilter(LayerFilterChain.java:57) uk.me.parabola.mkgmap.build.LayerFilterChain.startFilter(LayerFilterChain.java:75) uk.me.parabola.mkgmap.build.MapBuilder.processShapes(MapBuilder.java:1027) uk.me.parabola.mkgmap.build.MapBuilder.makeSubdivision(MapBuilder.java:712) uk.me.parabola.mkgmap.build.MapBuilder.makeMapAreas(MapBuilder.java:646) uk.me.parabola.mkgmap.build.MapBuilder.makeMap(MapBuilder.java:200) uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:97) uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:61) uk.me.parabola.mkgmap.main.Main$1.call(Main.java:208) uk.me.parabola.mkgmap.main.Main$1.call(Main.java:1) java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) java.util.concurrent.FutureTask.run(FutureTask.java:138) java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) java.lang.Thread.run(Thread.java:662) stacktrace.patch <http://gis.19327.n5.nabble.com/file/n5741801/stacktrace.patch> Gerd -- View this message in context: http://gis.19327.n5.nabble.com/There-is-not-enough-room-in-a-single-garmin-m... Sent from the Mkgmap Development mailing list archive at Nabble.com.