Cannot open OneNote Offline file cache corrupted

Question

Hi was actually helping someone who was not able to open up her OneNote app, it was giving the below error message.

"The notebook cache file is corrupted. OneNote must create a new cache file to continue. You may delete the existing cache file or keep a copy for technical support. Deleting the corrupted cache file will save disk space and will not lose any content already synced with your notebooks. However, if you have offline notebooks that have not synced recently, you will lose unsyned changes" and get the options to "delete cache" , "make a copy" or "cancel"

Since we didn't want to delete anything, I just clicked on Make a Copy and it opened up OneNote after that but everything that was there before has disappeared. I went to file and clicked on Open Backup and she doesn't have any recent backup, everything was pretty old. I actually don't know how she has been maintaining her OneNote files, if she synced her notes or not. Does anyone know where it went after we pressed make a copy? It didn't ask us where we want to make the copy, it just had a progress bar and then opened OneNote. This is on enterprise environment and she is not using OneDrive, Please help!

Answer 1

It looks like OneNote has just deleted the cache. The result is the same if you close all notebooks. So just re-open the existing notebooks.

BTW: The cache files folder you'll find in

C:\Users**<user>**\AppData\Local\Microsoft\OneNote\16.0

Bernd