I’m using the Aspose.Pdf.dll library, file version 7.4.0, product version 2012.09.28.
Hi Ryan,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
Thank you for the details.
It seems to be an issue with your PDF file. The Bookmark Level Property is used in the PDF file to specify multiple levels of bookmark and you can manipulate it using Aspose.Pdf for .NET as well. I would request you to share a copy of your problematic PDF file with sample code you are using, we will further check the issue and get back to you soon.
Sorry for the inconvenience,