SALZBURG, Austria – The little girl peered out the train window at the green, rolling hills of Austria, the country she had visited in her mind every day for months. “Dad,” she said, “Maria was on one of those mountains.” Her eyes lit up. The Austrians around us did not stir. It has been 60 years since the Julie Andrews classic The Sound Of Music opened in cinemas. It still enchants American viewers, but, despite bringing millions of dollars in tourism revenue to their country each year, it befuddles many Austrians. For all those Austrians: The film tells the story...