I've been busy generating new Garmin tiles, but unfortunately some of the tiles cause MapSource to crash... Software used: - MapSource 6.13.7 - Mkgmap-r991 & r977 & r973 - Splitter.jar Commandline: java -Xmx2048M -jar ~/garmin/utils/mkgmap-r973/mkgmap.jar --latin1 --description='OSM world Routable' --net --route --series-name='OSM World Routable' 63240101.osm.gz I provided the max-nodes=1000000 (1 million) to the Splitter commandline to prevent too many outOfHeapSpace errors. This seemed to help because Mkgmap failed to generate a map for only three tiles for the whole of Europe, Asia, Africa and Oceania, all other tiles did not produce errors. Unfortunately, not having errors does not mean those tiles work flawlessly in MapSource: some cause it to crash instead while working fine on my GPSmap 60CSx. Some further testing showed that the tile was rendered (using the same commandline!) without causing the problems using Mkgmap-r830. A few of the problem tiles are: http://planetosm.oxilion.nl/~lambertus/r991/63240101.img http://planetosm.oxilion.nl/~lambertus/r991/63240103.img http://planetosm.oxilion.nl/~lambertus/r991/63240105.img All three are in dense southwest part of the Netherlands. The only workaround I can think about is to cut those tiles in half and try again... It would be nice to know the source of this problem and how to avoid it and also have Mkgmap to indicate clearly if there is a problem.