NullReferenceException when attempting to open ppt using PresentationEx class

Aspose.Slides Product Family
1

I am trying to convert presentations in the PPT format to PDF. I am using version 4.4.0.0 of Aspose.Slides to do this. When I try to instantiate the PresentationEx class passing in the Stream for the PPT file I get the following exception & stack trace:

System.NullReferenceException: Object reference not set to an instance of an object.

Aspose.Slides.Pptx.ConnectorEx.PptxAfterLoad(IDictionary shapeIdToShape)
Aspose.Slides.Pptx.GroupShapeEx.PptxAfterLoad(IDictionary shapeIdToShape)
Aspose.Slides.Pptx.BaseSlideEx.Ppt2003AfterLoad()
Aspose.Slides.Pptx.PresentationEx.(Stream )
Aspose.Slides.Pptx.PresentationEx..ctor(Stream stream)

Code Snippet:

            var presentationEx = new PresentationEx(sourceStream);
            presentationEx.Save(targetStream, SaveFormat.Pdf);

I have also attached the ppt file for review.

2

Hi Ranjeet,

I have worked with your presentation and have successfully generated the PDF using Aspose.Slides for .NET 4.4.7. For your kind reference, I have attached the generated presentation as well. Please download the mentioned product version from here.

Thanks and Regards,

3

Mudassir, thank you for the quick response. We are referencing the Slides assembly that is targeting .net 3.5 but in the zip you have supplied I only see assemblies for .net 2.0. Can you provide the .net 3.5 assemblies too?

4

Hi Ranjeet,

Actually, Aspose.Slides for .NET 4.4.7 is intermediate version. The new version of the product has not yet been released and that will contain the dll for .NET 3.5. Moreover, the share .NET 2.0 dll works for all .NET platforms. Meanwhile, you may please rely on the shared dll and later on when the actual product will be released, you can use the .NET 3.5 dll.

Thanks and Regards,