Hi Rudi,
I have a problem with a zero length arc (mkgmap 1107):
SCHWERWIEGEND (RoadNetwork): Road null (OSM id 34881225) contains zero length arc SCHWERWIEGEND (RoadNetwork): http://www.openstreetmap.org/?lat=47.83413&lon=11.70958&zoom=17
This is a strange railway=platform. It is mapped like a very narrow 'area'. I have set the flag --remove-short-arcs and this road is also not on a tile border. (I tried the same area with mkgmap 1092 and the map was created without an error message.)
Is there a problem with the remove-short-arcs algorithm? (I can change the OSM data but I'd prefer to have an mkgmap version without error message for this kind of way).
Something that's bugging me about this example is that it's a railway platform and shouldn't be routable anyway. Have you styled it into a highway of some kind? If so, that could be the root of the problem. Anyway, I can't think any more tonight, I'll look again in the morning. Cheers, Mark