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On 26.05.2010 23:40, Steve Ratcliffe wrote: You need to combine two different maps of the same area (so most often one being contourlines) into the same mapset (meaning same tdb/overview image/mdr/....). Then whenever you route to an object that is inside the nonroutable map (i.e. the contourlines), Mapsource will not calculate the route but stop with:  -- Basecamp 3 will even outright get into a loop you can only escape by closing it via task-manager (don't ask me what happens if you use it via WINE) If you want, here is a beta map that you could install that shows the behaviour (install from d:/garmin/0mtb/mtbaustria1/ as the location is hardcoded inside the bat and the path is set for x64 windows, or exchange it with texteditor to your liking, or simply register the maps with Mapsettoolkit or by hand): run both install* .bat files, one will install without contourlines (correct routing), and one with broken routen (*srtm*). http://openmtbmap.x-nation.de/maps/beta/mtbaustria.7z.zip and here a route that will show the error: http://openmtbmap.x-nation.de/maps/beta/Broken_route.zip Sometimes it does not happen, but usually it does, it seems to depend how much other information that is routable is nearby. As to what I am told by Garmin, all future Firmwares will show the same behaviour, even worse, just having an activated mkgmap created map created without --route is then may be enough to crash the GPS. If you rebuild the 7*.img files (the contourlines) with --route, than the problem is worked around. (to rebuilt just open the *.img with gpsmapedit, save as MP, and recompile with mkgmap).
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