* Check if the file is in a format accepted by TaticView;

* TaticView reads the first ten columns (on the first visible tab in XLS and XLSX files) of the file to detect the data columns. In case the columns are not found, the process is aborted;

==== <span id="InvalidXLSXFormatException"> <span id="NotOOXMLFileException">XLSX file is in an invalid format</span></span> ==== <!--T:19-->