If I use the --index option with 1268 on any "big" country file from Geofabrik, the mdr file is not created: "D:\Garmin\mkgmap_680>start /low /b /wait java -enableassertions -jar -Xmx2800M mkgmap.jar --max-jobs=3 --latin1 --index --ignore-maxspeeds --ignore-turn-restrictions --remove-short-arcs=1 --road-name-pois=0x2f2d --locatio n-autofill=1 --description=openmtbmap_alp_09.10.2009 --route --country-abbr=alp --style-file=new2 --country-name=alps --mapname=65280000 --family-id=6528 --product-id=1 --series-name=openmtbmap_alp_09.10.2009 --family-nam e=mtbmap_alp_09.10.2009 --tdbfile --overview-mapname=mapset00 65280*.osm.gz *There is not enough room in a single garmin map for all the input data The .osm file should be split into smaller pieces first." *Splitting offers of course no help. The above is against alps.osm.bz2 from Geofabrik. (same problem with UK,NL,DE)