I've been running mkgmap fairly regularly for several years. I have a script that runs splitter and then mkgmap, and routinely 'svn up' to the latest (trunk) and 'ant build'. Usually this works fine. Today, I updated to: Path: . URL: http://svn.parabola.me.uk/mkgmap/trunk Repository Root: http://svn.parabola.me.uk/mkgmap Repository UUID: 25d90789-57f7-4ee0-8453-03a3dfeeeb22 Revision: 2371 Node Kind: directory Schedule: normal Last Changed Author: wanmil Last Changed Rev: 2370 Last Changed Date: 2012-11-01 07:07:58 -0400 (Thu, 01 Nov 2012) From a version probably in early October ("svn reflog" doesn't seem to work :-). Running mkgmap, I got: Time started: Sat Nov 10 08:50:17 EST 2012 java.lang.NoSuchMethodError: uk.me.parabola.mkgmap.reader.osm.Tags.get(Ljava/lang/Object;)Ljava/lang/String; at uk.me.parabola.mkgmap.reader.osm.Element.getTag(Element.java:50) at uk.me.parabola.mkgmap.reader.osm.HighwayHooks.onAddNode(HighwayHooks.java:97) at uk.me.parabola.mkgmap.reader.osm.OsmReadingHooksChain.onAddNode(OsmReadingHooksChain.java:64) at uk.me.parabola.mkgmap.reader.osm.bin.OsmBinHandler$BinParser.parseDense(OsmBinHandler.java:122) at crosby.binary.BinaryParser.parse(BinaryParser.java:124) at crosby.binary.BinaryParser.handleBlock(BinaryParser.java:68) at crosby.binary.file.FileBlock.process(FileBlock.java:135) at crosby.binary.file.BlockInputStream.process(BlockInputStream.java:34) at uk.me.parabola.mkgmap.reader.osm.bin.OsmBinMapDataSource.load(OsmBinMapDataSource.java:63) at uk.me.parabola.mkgmap.main.MapMaker.loadFromFile(MapMaker.java:144) at uk.me.parabola.mkgmap.main.MapMaker.makeMap(MapMaker.java:56) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:210) at uk.me.parabola.mkgmap.main.Main$1.call(Main.java:207) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:680) Exiting - if you want to carry on regardless, use the --keep-going option Time finished: Sat Nov 10 08:50:18 EST 2012 Total time taken: 903ms I tried 'ant clean' followed by 'ant build' again, but that didn't help. I looked at https://wiki.openstreetmap.org/wiki/Mkgmap/dev and it references protobuf.jar and osmprotobuf.jar; I suspect the problem may be that I had an old version. I dimly recall a tool 'ivy' that is supposed to deal with getting up-to-date versions, but I can't find any reference to it in the sources or the wiki page. So I wondered if the protobuf versions I had (fall 2010) were old. I removed all files in my working directory that weren't versioned (except for a few text files of notes to myself), and rebuilt. Now it seems ok. So there seems to be a bug in dependency tracking.