https://www.infopathdev.com:443/forums/45.aspxenCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/54645.aspxFri, 07 May 2010 19:57:22 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:54645sjb_dev0https://www.infopathdev.com:443/forums/thread/54645.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=45&PostID=54645this line did it: if (attachmentNode.MoveToAttribute("nil", http://www.w3.org/2001/XMLSchema-instance")) { attachmentNode.DeleteSelf(); }https://www.infopathdev.com:443/forums/thread/54644.aspxFri, 07 May 2010 19:47:42 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:54644sjb_dev0https://www.infopathdev.com:443/forums/thread/54644.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=45&PostID=54644after a few more tests, my code works if i add an attachment manually to the file attachment field first, and then run my code against it. the manually uploaded attachment is overwritten with my programmatically created xlsx file. do i need to clear some value out of an empty file attachment control before programmatically setting the value?https://www.infopathdev.com:443/forums/thread/54643.aspxFri, 07 May 2010 19:28:49 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:54643sjb_dev0https://www.infopathdev.com:443/forums/thread/54643.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=45&PostID=54643I'm creating a xlsx file utilizing the ExcelPackage object, and would like to set this byte[] as an attachment within my 2007 IP Browser Enabled form. I'm creating the excel file and converting it to base64 before attachmentNode.setvalue(), but I keep getting the following error: Schema validation found non-data type errors. Any ideas? ... byte[] filedata = xlsxPkg.GetAsByteArray(); ... attachmentNode.SetValue(Convert.ToBase64String(filedata));