I've noticed that if I use the splitter option --geonames-file==cities5000.txt, and it can't find any cities within the splitted tile, it skips the description name. Processing mkgmap with the template.args file results in a tile with a description name of the preceding tile, because of the # in the template. On my map this results in two maps having the same description name: In the template.args file: mapname: 20010022 description: NL-Sneek input-file: 20010022.osm.gz mapname: 20010023 # description: OSM Map input-file: 20010023.osm.gz In the processed gmapsupp.img: 20010022 MPC 3742902 5 1252 20 1 20010 NL-Sneek (20010022) 20010023 MPC 324001 5 1252 20 1 20010 NL-Sneek (20010023) I suggest to leave the # out of the default description names in the template.args file, or is there another way to fix this error?