Help with red, sweet sherry name
Well, nothing matches the criteria.
Sherry is produced only in Spain -- in the region Jerez de la Frontera, Sanlúcar de Barrameda, or El Puerto de Santa María. It is produced rom white wine grapes -- principally Palomino, though Pedro Ximénez and Moscatel are also used. The latter two are always sweet. Moscatel is bottled alone. P.X. *can* be bottled alone, but is traditionally used to sweet Palomino, thus turning it into a Milk or Cream Sherry.
Now, having said all that, this isn't to say there are no sweet red wines produced in Argentina. Some producers vinify the Bonarda grape in an off-dry/slightly-sweet style. (This probably isn't really Bonarda, but rather Charbono, ,but that's another story.) One example is from Byblos.
Could that be it?