Hi,

..  v.vect.stats uses the key column recorded in the db link info. If
there would be a problem with the points vector, v.vect.stats should
print something like

area_cat|count|average
1|0|null
2|0|null
3|0|null

Maybe rebuilding topology helps?

I created a new vector of points (tmp4) using v.select, operator=within

Building areas...
0 areas built
0 isles built
Attaching islands...
Attaching centroids...
Topology was built
Number of nodes: 577
Number of primitives: 577
Number of points: 577

All these points are inside the areas 1, 2, and 3 of the area vector "rami".

Also output of v.info on the area vector

Area vector is "rami":
  Type of map: vector (level: 2)
  Number of points:       0               Number of centroids:  3
  Number of lines:        0               Number of boundaries: 3
  Number of areas:        3               Number of islands:    3
  Map is 3D:              No
  Number of dblinks:      1


and v.vect.stats after g.gisenv set="DEBUG=2".

(Tue Oct 18 12:36:48 2011)
g.gisenv set=DEBUG=2
(Tue Oct 18 12:36:48 2011) Command finished (0 sec)
(Tue Oct 18 12:36:58 2011)
v.vect.stats -p points=tmp4 areas=rami type=point method=average pcolumn=uav8 
ccolumn=nuav scolumn=uav8min --verbose
(Tue Oct 18 12:36:58 2011) Command finished (0 sec)


I am using GRASS-7, r47868.

Andres
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