[GRASS-user] ERROR: Database connection not defined

[Jose A. Ruiz-Arias]

Dear list,
after importing a tab file formatted with columns xutm, yutm and cat 
using v.in.ascii, I have try v.db.select against this vector and the 
next error appeared:

'ERROR: Database connection not defined'

This is a bit odd for me considering that I remember some weeks ago I 
created with v.in.ascii other point vectors from tab files formatted 
like this and v.db.select worked properly. Someone could advise me?