Inconsistent Generation of Thumbnail Image and PowerPoint Slide

Dear Aspose team!

We have stumbled upon an inconsistency in how thumbnail and pptx gets generated for a specific case.

What we do is the following:

We have a template with a X Y Scatter chart which is backed with an Excel workbook. In our application we modify the Excel data with new values and labels. When generating a thumbnail image from the presentation we get different labels in our chart when looking at the thumbnail compared to the generated PPTX (the thumbnail contains labels from our base template and the PPTX gets the correct labels set by our code). If we save the presentation first and then use the saved PPTX to generate a thumbnail it looks as expected.

We have attached a code example that highlights this behavior. The code generates 3 files:

  • thumbnail_before_save.png (Shows the incorrect labels)
  • result.pptx (Has the expected labels)
  • thumbnail_after_save.png (Also has the expected labels) (38.0 KB)

Thanks in advance!

Thank you for reporting the issue.

Unfortunately, you have not shared the thumbnail_before_save.png and thumbnail_after_save.png files. I reproduced some incorrect labels when generating the thumbnails before and after saving the presentation. compare.png (47.8 KB). Could you please confirm that you have the same result?

@Andrey_Potapov, thanks for you reply.

Your attached screenshot very much mimics the result we are seeing.

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

  Issue ID(s): SLIDESNET-43724

You can obtain Paid Support services if you need support on a priority basis, along with the direct access to our Paid Support management team.

Thank you for the confirmation. I’ve added a ticket with ID SLIDESNET-43724 to our issue-tracking system. We apologize for any inconvenience. Our development team will investigate the case. You will be notified when a new release of Aspose.Slides with a fix is published.

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