Error on route calculation (buscar ruta)

Hi,

I checked the route calculation (buscar ruta) without internet connection and got the message "End of input at character 0 of". I suggest something like "Calculation needs internet connection".

With a OSM map open, the calculated route (car/shortest) looks nice with the blue line and symbols for turning. But the route ignores oneways and blocked roads, which are marked as in OSM. Question: Which service do you use for calculation?

Thanks,
Benrasi