Mark Burton wrote: 
Thanks to those who have tried yesterday's table A patch. Seems like it
hasn't caused any problems (so far).
After playing around a bit on my Vista HCx I did notice slightly different routing too. The maximum distance that it manages without "route calculation error" did not change however.
Today's offering includes the table A tweak but it also increases one
of the limits that determine when a route centre needs to be
sub-divided. As far as I can tell, the limit was somewhat smaller than
it should have been. So with this patch, fewer routing centres should
be required (obviously depends on the map data).
Routing in Mapsource is now different too. So far I have found one route that does not calculate with the old version, but with the new. The difference is however 2-3 more turns, so no drastical improvement. Maybe some routes also degrade?
 

So please test this patch (it replaces the previous patch) and let me
know if their are any issues.

You must enable assertions, otherwise if the data structures overflow
you won't know until mapsource/gps barfs.

Cheers,

Mark

BTW - if you are not interested in routing over footpaths, changing
them to a non-routable type will simplify the routing data further.
  

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