Well, I got notified that there is a routing problem in one of my maps, and after trying around a long time, I tracked it down to release 2448 that breaks routing under certain occasions. Here is a screenshot of the the routing failing: http://openmtbmap.org/broken_routing.jpg So for a very short distance, the routing will actually route over the broken road (the section where the route is missing). However for longer sections on that road, or route that actually has a routepoint manually set on it, Mapsource/Basecamp/GPS will fail to calculate a route at all. (e.g. if you try to route from the North point of the route in the picture, South to the Bergkirchen place POI/node). It is dependant on the the style - but I played with deleting lots of stuff from the style, and it seems to be quite random. So here are the downloads (all .exe are lzma packed, just unpack them if not on windows): http://openmtbmap.org/velonordrhein-westfalen_working_2447.exe http://openmtbmap.org/velonordrhein-westfalen_broken_2448.exe Search for Bergkirchen, it is in the tile 66570017 Maps are compiled with: c:\OpenMTBMap\maps>start /low /b /wait java -jar -Xms4000M -Xmx10400M c:\openmtbmap\mkgmap.jar --max-jobs=8 --generate-sea --latin1 --precomp-sea=c:\openmtbmap\maps\sea "--style-file=c:\openmtbmap\velomap_style" --nsis --index --transparent --adjust-turn-headings --add-pois-to-areas --ignore-maxspeeds --reduce-point-density=3 --x-reduce-point-density-polygon=6 --link-pois-to-ways --ignore-turn-restrictions --remove-short-arcs=5.4 --min-size-polygon=18 --description=velomap_dnw --show-profiles=1 --location-autofill=bounds,is_in,nearest --bounds=c:\openmtbmap\maps\bounds --route --country-abbr=dnw --country-name=nordrhein-westfalen --mapname=66570000 --family-id=6657 --product-id=1 --series-name=velomap_nordrhein-westfalen_30.01.2013 --family-name=velomap_dnw_30.01.2013 --tdbfile --overview-mapname=mapsetc --keep-going --area-name="nordrhein-westfalen_30.01.2013_velomap.org" -c c:\openmtbmap\maps\template.nordrhein-westfalen 7*.img 1>NUL --remove-short-arcs == resulting road will be broken --remove-short-arcs=5.4 == resulting road will be broken without remove-short-arcs == resulting road will be broken So it doesn't directly have to do with the --remove-short-arcs function. (also Compiled with --remove-short-arcs=5.4 ) http://openmtbmap.org/velonordrhein-westfalen_broken_2466.exe then Uncommented the following lines in my style-file, which shouldn't affect routing at all, but it does as the mistake is gone: # power=line [0x29 resolution 22 continue] # power=minor_line | powerline=yes | power_line=yes | powerline=true | power_line=true [0x29 resolution 24 continue] http://openmtbmap.org/velonordrhein-westfalen_nopower_2466.exe However I can also leave that line in the style-file, and delete some other lines, and routing will work again. There seems to be no clear pattern (except that the bug go introduced with rev 2448). I use the same line in my openmtbmap, and there the routing error doesn't happen. -- keep on biking and discovering new trails Felix openmtbmap.org & www.velomap.org