Unable to parse the attached pdf to valid Excel

Hi Aspose support team,

i was trying to parse the attached PDF to Valid Excel using aspose pdf in linux OS.iam getting the below exception.
"Tagged PDF Expected."

the process i followed is i have converted the PDF to XML and from XML i am doing Valid Excel conversion using aspose Cells

please find my code below for converting PDF to XML using aspose PDF.


pdfDocument = new Document(directoryName +file.getName());

ExcelSaveOptions excelsave = new ExcelSaveOptions();

pdfDocument.save(directoryName + absFileName +".xml",excelsave)

here only iam getting the exception.


please Help me for parsing the attached pdf.

thanks
Surya