Hi!
We are trying To convert between the Pptx and Ppt formats using Aspose.Slides for .NET 21.9.0.
Given the Ppt file attached below, we use the following code To convert it To Pptx. However, conversion back To Ppt fai…...PPTX to PPT Conversion Fails with "Parameter Is Not Valid" Error...trying to convert between the pptx and ppt formats using Aspose.Slides...