We have a requirement to get output as Excel in an existing XML Publisher report. Our system is oracle 11i. The report is currently existing in XML Publisher with the TYPE as ‘XSL-XML’ where the template file is a .xsl file and output file is .xml file. We need the output to be an Excel file instead so we are trying to use ‘XSL-FO’ type now to get the output in Excel format but the post processing of the request keeps on failing with error ‘element Workbook is not supported yet’. We have checked Install->Viewer Options and the value is : File Format: XML Mime Type: application/vnd.ms-excel Description: Microsoft Excel Allow Native Client Encoding: Checked. Also the Profile Option 'Viewer: Application for XML' is set as ‘Microsoft Excel’ for the concerned Responsibility. We need to format the Excel in a particular way so we are .xls file and not a .rtf file for template. Could someone please provide any pointers on the same.