Well, now the routing issue seems more systematic. Starting from italy.osm.bz2 from geofabrick... A) using latest splitter 105, compiling with latest mkgmap 1537 -> trying a route in Rome, you got an error in mapsource. B) using latest splitter 105, compiling with mkgmap 1187 -> trying a route in Rome, mapsource routing works. -> loaded gmapsupp.img in nuvi255: nuvi says UNABLE TO FIND A ROUTE C) using oldest splitter (ver ?, .jar is 51 kbyte), compiling with mkgmap 1187 -> trying a route in Rome, mapsource routing works. -> loaded gmapsupp.img in nuvi255: nuvi routing works. This issue is more or less the same since months. There should be some osm data in Rome that makes splitter/mkgmap making this bad error. I've not been able to reduce the osm file and reproduce the same issue on a smaller map. Ciao, Marco.