I've just been updating my IMG creation process to use all the new mkgmap options (was running a pretty old version), and noticed a little bit of weirdness. I'm using a template file to create some standard format maps, and if the --net parameter is specified in the template file, the first IMG file created gets the default 62340001.IMG file name, regardless of the other parameters such as map name. Using version r984. Eg: Template File: family-id: 3081 product-id: 2601 overview-mapname: 30810100 net gmapsupp tdbfile # Following is a list of map tiles. mapname: 30810101 description: OSM-AU Victoria input-file: VIC.osm.gz country-name: Australia country-abbr: AUS region-name: Victoria region-abbr: VIC mapname: 30810102 description: OSM-AU New South Wales input-file: NSW.osm.gz country-name: Australia country-abbr: AUS region-name: New South Wales region-abbr: NSW ... (Five more file templates here) Command line: java -Xmx1024M -jar mkgmap.jar -c template.args This builds a file set like: 62340001.IMG 30810102.IMG ... (next five files correctly named) 30810100.IMG 30810100.tdb If the net parameter is removed from the template file OR the --route parameter is supplied, then all the files are correctly named. I can live without the net parameter, but just thought I'd the issue up the flagpole... Matt