Currently mkgmap crashes on compiling alps or italy from geofabrik (yesterdays and todays download tested). Tested with 1393 and 1396. No matter whether using my own style-file or mkgmap default. It seems to me that there must be some crazy road data in northern Italy. Here's my commandline: start /low /b /wait java -enableassertions -jar -Xmx4200M mkgmap.jar --max-jobs=3 --latin1 --index --delete-tags-file=deletetags --adjust-turn-headings --ignore-maxspeeds --ignore-turn-restrictions --remove-short-arcs=4 --location-autofill=1 --description=openmtbmap_%abr%_%date% --route --country-abbr=%abr% --country-name=%country% --mapname=%mapid%0000 --family-id=%mapid% --product-id=1 --series-name=openmtbmap_%abr%_%date% --family-name=mtbmap_%abr%_%date% --tdbfile --overview-mapname=mapset --area-name=%country% d:\garmin\mkgmap_680\maps\%mapid%0*.osm.gz java.lang.NullPointerException at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addRoadWithoutLoops(StyledConverter.java:1605) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addRoadAfterSplittingLoops(StyledConverter.java:1153) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.addRoad(StyledConverter.java:1081) at uk.me.parabola.mkgmap.osmstyle.StyledConverter.convertWay(StyledConverter.java:290) at uk.me.parabola.mkgmap.reader.osm.xml.Osm5XmlHandler.endDocument(Osm5XmlHandler.java:560) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endDocument(Unknown Source) at com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.endDocument(Unknown Source) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) at javax.xml.parsers.SAXParser.parse(Unknown Source) at javax.xml.parsers.SAXParser.parse(Unknown Source) at uk.me.parabola.mkgmap.reader.osm.xml.Osm5MapDataSource.load(Osm5MapDataSource.java:80) at uk.me.parabola.mkgmap.main.MapMaker.loadFromFile(MapMaker.java:148) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:56) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:187) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:185) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exiting - if you want to carry on regardless, use the --keep-going option