[GRASS-user] v.dissolve Key column must be of type integer or string

[G. Allegri]

I don't know why the v.dissolve raises the usual error:

"Key column must be of type integer or string"

My column is of type CHARACTER. I've also tried to change it to
INTEGER, but nothing happens.
I've used the command many times before, but I don't remember if I've
ever used it after recompiling my grass6_devel trunk (about one month
ago).

I'm trying to run it against a polygonal layer composed by three,
confining, polygons.

Giovanni