[GRASS-dev] calculate distance with vector

[Quentin Page]

hi,

I want to know what are distances between several little vectors and the 
big one.
so I write :

v.distance -p -a from=grille247 at ventoux288 to=roland3 at ventoux288 
from_type=centroid to_type=boundary from_layer=1 to_layer=1 dmax=-1 
upload=cat,dist table=cat,dist

the little vectors are in grille247 and they contain lots of another 
information.
the error is
Required parameter <column> not set:
(Column name(s) where values specified by 'upload' option will be uploaded)

how can i set the column.

thanks a lots