After 2001, there are no dollar's account, so you can get only pesos argentinos
depend on the availability of ATM. - I strongly reomend to go in the morning when ATM have money, if you go at night or on weekend you may get only 100 pesos by each withdraw.
Tomokoar, please recheck you info. Dollar accounts are needed when making a money transfer from US to Argentina. I just opened a new one a few months ago, for business purposes. Not sure what bank institution you are referring but mine was more than happy to see me deposit u$s each time, and when I need u$s they give me the same but it has to be an inside the bank transaction,never at an ATM.