For example: http://www.te.com/commerce/DocumentDelivery/DDEController?Action=showdoc&DocId=Specification+Or+Standard%7F408-10389%7FM1%7Fpdf%7FEnglish%7FENG_SS_408-10389_M1.pdf%7F2151493-1 It fails with "error=1". If I give it a plain url ending in .pdf, it works fine.