When I went to the Power Point examples at http://www.aspose.com/Products/Aspose.PowerPoint/Demos/ and clicked submit, I saved the file demo. I have MicroSoft PowerPoint 2002 (SP-2) on my XP machine. When I click the saved file from the demonstration link in explorer, I get the message "power point can’t read “D:\PPT\demoppt.ppt.” But when I launch PowerPoint from the tool bar, and open up the file demoppt.ppt from D:\PPT\demoppt.ppt, it opens fine. Any ideas why this may occur?