How do I resolve the error code: 0xE0000644 9zu13 on OneNote?

Question

How do I resolve the error code: 0xE0000644 9zu13 on OneNote?

Myron D 0

The Issue:

My desktop application is locked in a "Read-Only" version for this notebook. When I try to sync manually, it fails and throws the following error code: 0xE0000644 9zu13. Apparently this error code shows up "when a section group or section name contains special characters that interfere with syncing".

What I have noticed:

I can add notes online via the web browser, and those changes successfully sync down to my desktop application.
However, the reverse is not working. I cannot sync any changes made from my desktop app up to the cloud due to the read-only restriction.
When I opened my notebook on my phone and laptop it did synchronize correctly, unlike on my pc.
I did add new notebooks to see if those would also not sync, but that wasn't the case. It seems that there is just a name or symbol in a section that is causing synchronization issues.
I've tried to copy some of my more recent onenote sections into another notebook but it doesn't seem to cause problems for that other notebook. Via another question on Microsoft Q&A I've also seen that an option would be to copy everything from the notebook into a new notebook, but doing so for me would take hours if not days because of the amount of stuff I'd have to migrate over.

I would like to know what kind of symbol would cause this problem and I'd like to know how i can access the bin for notebooks online so I can see if deleting any notes in there would fix the problem.

I also just noticed that this notebook stopped synchronising like a week or so ago (26-06-2026), but the "Read-Only" came up like yesterday. Would that mean that I have to delete/move over every note I made during this period to solve the problem?

0 comments

Answer recommended by moderator

0 additional answers

Your answer

Answer 1

I just solved my problem.

I made sure every important note is in the online version and up to date
I noticed that one section was missing that I had made a few days ago that didn't have much in it
I closed my notebook in the desktop version of OneNote and only after that did it show me the section that didn't want to synchronize
I opened my notebook again and pressed synchronize to get all my sections, pages etc back
After that I added the section that didn't want to synchronize to a new notebook just in case it would mess up my main notebook again, but it didn't seem to cause a problem again, so I put it back into my main notebook.
The only 'special' character that I think could've caused the problem that time is the '-' (minus) symbol but I didn't even remove it from the section name and now it synchronizes just...
Edit: I just noticed that any new section I make in the specific section group in which the problem-causing section was located, immediately causes the synchronization problem again. So I removed a part of the name of the section group; it synchronized again like normal; I put the part of the name back and the problem was solved... Although putting back the same section again did cause the problem again so I had to remake the section and weirdly enough even without changing any names in the section or pages, it synchronized as normal...