The source of the corruption was a not multibyte-safe sanitization of the sheet name. So in case a sheet name contains non Latin characters, it could lead to corrupted sheet name, which causes the corrupted file warning from Excel.
The source of the corruption was a not multibyte-safe sanitization of the sheet name. So in case a sheet name contains non Latin characters, it could lead to corrupted sheet name, which causes the corrupted file warning from Excel.