When I want to open this file, Excel gives me this message:
We have detected a problem with the content in ExcelTest.xlsx. Do you want to try to recover everything that can be recovered? If you trust the source of the workbook, click Yes.
Clicking YES will not do anything, what am I doing wrong?
how did you downloaded the file? Did you use data snapshot browser and then you renamed the file undifiend.bin into xlsx? If yes then this is the reason. Try to use Integray File Writer and open the file then or use email sender where you have to add filename.