Thanks so much Pepe, I have checked the option you suggest, but it is not working yet, when I export the csv file, the columns for the attributes are ok with o “0” for the global, and “0” for visible, but still like that the attributes are taken as “used for variations” by default.
If there is any other suggested solution I would apreciate it.
Here you can check what I′m talking about, in the next link
image with the problem pic,