Working with powerpoint 2007 presentations

I have an application I’ve built in ASP.Net using Aspose.Slides. The app takes existing presentations and displays their slides as thumbnails. The user can then select individual slides to create new presentations from. The app works wonderfully with presentatons with a .ppt extension. But once I try to use a .pptx presentation, the app errors out with the “Arithmetic Operation resulted in an overflow.” Any idea why this happens? Does slides support 2007? Thanks.

Dear Travis,

Thanks for considering Aspose.

.pptx presentations are completely in different format. To open them PresentationEx class is used, while to open .ppt presentations, Presentation class is used.

Thumbnail feature is not available for .pptx presentations currently, it is under-development.