Hi Aspose team,
in attached project you can find source and 3 OneNote files which cannot be opened through Aspose.Note with following errors:
Doc name:OneNote\1.one, Error:Unknown binary data compression in OneNote Online file format.
Doc name:OneNote\2.one, Error:Page manifest node is missed.
Doc name:OneNote\3.one, Error:Unknown binary data marker in OneNote Online file format.
Files where created locally on my computer and uploaded to SharePoint.Online. For 1st and 3rd file I see that it is OneNote.Online format but anyway, this error might help you in extension of Aspose.Note to Online direction.
Thanks for check,
3Errors.zip (3.5 MB)