>Which program are you using for splitting the tiles?  Are the relations
>defined fine in the split tile .osm files?  The node and way members of a
>relation should be defined before the relation in the .osm file.  Otherwise,
>mkgmap will pretend that the node or way is not a member in the relation.

I am using splitter.jar to split my Italy's OSM file.
Looking into the resulting file containing the ways wich belongs to the route
I mapped, I cannot see the relations (wich are contained into the original
file), so this is the problem! :o)

Fabrizio