When we export Spreadsheet's book model as a Excel 2007 file with charts, the file cannot be read by Excel 2007. When opening the corrupt file in Excel, it shows a message Excel found unreadable content in 'unread.xlsx'. Do you want to recover the content of this workbook? If you trust the source of this workbook, click yes.
- run Spreadsheet (or use online demo)
- insert a line chart
- export it as a Excel file
- open the exported Excel file with Excel 2007
the exported file is open correctly.
Excel shows the error message mentioned in "Problem Description". If we choose to recover the content, the exported file can be open but charts disappear.