Hello,
VISUM uses localized keywords in their data files. Currently only the
german version is supported.
If you can provide a mapping from the table names and attribute names (of
the german version) at
http://sumo.dlr.de/wiki/Networks/Import/VISUM#Import_Coverage
to their Italian counterparts we could add this to sumo. (An example of a
german VISUM file can be found at
http://sumo.dlr.de/trac.wsgi/browser/trunk/sumo/tests/netconvert/import/visum/messstreckeV1/visum.net
)
as a quick fix you could just rename the code words within your file using
search/replace.
I noticed that your network contains data from OSM. You could also just
import the OSM data directly (
http://sumo.dlr.de/wiki/Networks/Import/OpenStreetMap)

regards,
Jakob

2015-04-30 11:58 GMT+02:00 Valeria Caiati <[email protected]>:

> Hi,
> I'm trying to import a native VISUM network file (extension ".net", version
> 14) with NETCONVERT in SUMO (version 0.22).
>
> netconvert  --visum-file 2015-04-29_Bologna.net --visum.verbose-warnings -o
> bologna.net.xml
>
> Unfortunately, the conversion operation returns me an error:
> Error: No nodes loaded.
> Quitting (on error).
>
> I would like to know if there is incompatibility between the newer version
> of Visum (14) and Sumo 0.22 or if there is some other type of error.
> Thank you,
> Valeria
>
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