i have downloaded the australia-oceania.osm from http://download.geofabrik.de/osm/ but when i split it is ok but re combine is not split the osm data file start /low /b /wait java -enableassertions -Xmx600m -jar ..\bin\splitter.jar --mapid=66%FID%001 --max-nodes=800000 --overlap=2000 ..\OSM-Data\%osmfile% gmasupp.img combine start /low /b /wait java -enableassertions -Xmx1100m -jar ..\bin\mkgmap.jar --max-jobs=1 --code-page=1252 --levels=0:24,1:22,2:20,3:18,4:16,5:14 --make-poi-index --country-name="%country%" --latin1 --family-id=%FID% --mapname=66%FID%001 --overview-mapname=66%FID%000 --tdbfile --index --add-pois-to-areas --series-name="OSM-%country%" --family-name="OpenStreetMap: %country%" --road-name-pois --route --remove-short-arcs --preserve-element-order --style-file=..\bin\resources\styles\ --style=%style% --description="%country%" --gmapsupp -c template.args error msgs are severe poly line errors Stephen