Hi, with r2448 the removeShortArcs routine was no longer applied to non-routable ways. This increased the possibility that an invalid line passes all filters but finally is not written to the RGN file while still increasing the subdivision lineNumber. This breaks routing in some case. Attached patch adds a check to the final filter to avoid that. fix_routing_v1.patch <http://gis.19327.n5.nabble.com/file/n5747979/fix_routing_v1.patch> @Steve: It would also be possible to create a new filter for that, but this would mean that we duplicate most of the code in LinePreparer. I don't know if this would be better. Ciao, Gerd -- View this message in context: http://gis.19327.n5.nabble.com/Patch-for-routing-problems-in-r2448-and-highe... Sent from the Mkgmap Development mailing list archive at Nabble.com.