Structured storage version is not supported

Hi I am trying to process excel file with following code but getting error like

This structured storage version is not supported.
Workbook excelDocument1 = new Workbook();
FileInfo fileInfo = new FileInfo(file.FilePath);
byte[] bytes = File.ReadAllBytes(file.FilePath);
MemoryStream stream = new MemoryStream(bytes);
stream.Position = 0;
//excelDocument1.Open(stream, FileFormatType.Excel97To2003);

            Workbook workbook = new Workbook(stream);


I tested your scenario/case with a sample XLS file and it works fine. Here is my sample code that works fine and I do not get any exception:
Sample code:

byte[] bytes = File.ReadAllBytes("g:\\test2\\test.xls");
MemoryStream stream = new MemoryStream(bytes);
stream.Position = 0;
Workbook workbook = new Workbook(stream);

I am using latest version, i.e., Aspose.Cells for .NET v23.11. Which version of the APIs you are using? Could you please zip and attach your Excel file, we will check it soon.

We have fixed a same private issue Unable to open an xls file of 2003 version - #14 and log it with id CELLSNET-54646.
And this issue has been fixed , we will release it in the next version 23.12