The latest version Aspose Cells for Java
v220.127.116.11 does not reproduce this issue . Please download. Below is my code. I have also attached the output file.
The xls file(Export_Testing_(ASPOSE)) can be opened fine here for all excel versions(excel2003/2007/2010).
Did you find any problem for opening this file in excel? If so, which version of excel are you using?
And please share your screenshot here so we can get more information about the problem.
Workbook workbook=new Workbook();
workbook.save(filePath + “.out.xls”, FileFormatType.EXCEL97TO2003);