A: Check that the file is not in Excel v5.0/95 Workbook format. ioGAS does not support excel files in this version so save the file as either Excel 97-2003 Workbook (*.xls) or the latest Excel Workbook (*.xlsx) and re-import.
Also make sure that the Excel worksheet you are importing does not contain formulae. Try copying the data into a new worksheet by left mouse clicking on the top left border cell in the worksheet in Excel to highlight all the columns and rows in the dataset. Once they are highlighted right mouse click in the top left border cell in the worksheet and select Copy. Right mouse click again in the top left border cell in the worksheet and select Paste Special. In the Paste Special dialog select Values. Click OK to paste the values. The worksheet should now be a flat table that does not contain any formulae. Re-import this worksheet into ioGAS.