@jpm : many thanks for your thoughts Today was a lucky day because I finally found the quickest way to import / export a CVS file, after it has been modified by a listview control. Here are the steps that led me here : 1) Import phase : _CSVSplit() by Czardas, found here : I haven't found another function that is so reliable. We'll talk about its speed a bit later. Melba23 indicated here to Water that, from AutoIt v3.3.12.0, _FileReadToArray() could be used to parse a CSV file int