I am using Aspose.Cells to process excel files. Also there is a requirement to process DIF files (Data Interchange Fomat) in the same way I process excel file. DIF files can be viewed with Microsoft Excel. However when I am trying to open the file using the Workbook.Open method, I am getting the error "This file's format is not supported or you don't specify a correct format." I tried to open the file by specifying the FileFormatType as CSV. It worked but the file cannot be processed in the same way I do for excel. For instance I do not get the correct cell values at proper positions after I process it as CSV. Please let me know if by some means I can work on this file in the same way we do for excel files. I am uploading a sample DIF file for your reference.