I know from my friends in Iberia that they train a lot in Quito, but only with tha A340-300, because they dont have a sim of the -600.
The Pilots Union and the Safety Dep. of the company have requested that one of the two sesions of each year will be on a A340-600 sim, but the company response is that another sim of the -600 is very expensive.
One of the Sims of Iberia is compatible with the A340-600, but the conversion and the new software costs 3 Millions of Euro, also expensive in terms of the company.
They prefer to risk another plane in places like Bogotá (SKBO) San Jose (MROC) and Guatemala (MGGT) rather than pay the 3 Million Euros. I think that maybe the cost of the insurance is less, and they will be earning money if the lost another plane.