When I try to do…
It will not work. You can create an empty pptx and pass it as argument.
I was attempting to do that as well with…
First exception means that xml file inside pptx presentation used as template doesn’t follow OpenXML scheme. We will investigate it.
The second exception probably because testoutput.pptx file is not a pptx presentation or may be broken.
Here is the problem that I am actually trying to solve…
We will prepare the fix on weekends. So default constructor will work after that.
Please try attached new version of Aspose.Slides for .NET. Default PresentationEx() constructor should work now.
It would be great if you provide the source pptx and the source code you are using for investigation.