Thank you for your interest in Aspose.Slides.
I have observed your comments and like to share with you that I have worked with the presentation files shared by you but I have not been able to reproduce the issue on my end as the presentation, “Test+2003++translation.ppt” , is being successfully loaded without any error. The presentation “tutorial.ppt” is not being opened with PowerPoint 2013, and for the third presentation nounmasculino.ppt, I am unable to download this file and request you to please upload it once again so that I may test it as well. Before sharing this file please try using Aspose.Slides for Java 15.6.0 on your end as support is available on basis of latest available version of Aspose.Slides.
Please let us know if the issue persists. We will be happy to assist you further.