I am using Aspode Slides version 1.7.4.0 and when getting the thumbnails of the slides, some of them appear to be missing data.  Graphs primarily.  I have included the sample PPT and the images generated from the following code:

RenderedImage img = slide.getThumbnail(1, 1);
ImageIO.write(img, "jpg", new File(imagePath + "/" + slide.getSlideId() + ".jpg"));

Thanks.
           

Dear gdboling,

 

Please download Aspose.Metafiles from here and add it to in the classpath. There will be no missing data.

 

I have done it myself and attached all the thumbnail images of your presentation for you to view them.

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Many Thanks and Kind Regards,

Shakeel Faiz
Support Engineer
Aspose Tyumen Team