Is it possible to be granted entry to Argentina as a tourist anywhere other than at the port of entry (e.g., Ezeiza)? Probably not. So the issue is not whether she can be granted a tourist entry while still holding a valid Precaria; the issue is that she can't be granted a tourist entry until she actually sets foot on Argentine soil. If she can't come back before the Precaria expiry day, then unless you get a lawyer to try and make a special exception, I think you simply return on your next trip to Argentina, she presents her foreign passport like any other foreigner on the flight, the border official grants her the usual 90-day entry permit. Then, if she still wants residency, she starts the process all over again by presenting all her documents.