Can you provide more details what you are doing?

Are you opening a .potx file, modify it with POI and save as .pptx ?

If so, one important step is required: you need to replace potx
content type with pptx:

ppt.getPackage().replaceContentType(
  
"application/vnd.openxmlformats-officedocument.presentationml.template.main+xml",
  
"application/vnd.openxmlformats-officedocument.presentationml.slideshow.main+xml");

Without it PowerPoint won't recognize the file.

Yegor

On Tue, May 22, 2012 at 6:12 PM, Pablo Rivera | MediaSquare
<[email protected]> wrote:
> Hi,
>
> I want to apply the master and layout slides of a potx file to a pptx. If I
> create a XMLSlideShow passig it the potx file it works in LibreOffice, but
> MS Office 2010 cant open it. If I save the potx as a pptx everything goes
> OK, but if it is possible I'd prefer the elegant way with potx :)
>
> What should I do?
>
>
>   -
>   - *Pablo Rivera*
>   - Software Engineer
>   -
>   - [email protected]
>   - T:(+34) 902 10 83 84
>   -
>      -
>   - www.mediasq.com

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