How to Fix OneNote Sync Error 0xE00012E3 and Open Sections
Question details
The user needs to resolve a persistent synchronization error preventing OneNote notebook sections from opening.
- Product
- Microsoft OneNote
- Device & OS
- Windows
- Scenario
- Syncing notebooks stored in OneDrive using the OneNote desktop application.
- Observed behavior
- OneNote repeatedly displays error 0xE00012E3 bbdqt, locks notebook sections, and shows sync errors for all OneDrive notebooks. Clearing the local cache only resolves the issue temporarily.
Before proceeding, manually back up any unsynced notes by copying the text to another application, such as Notepad or Word, to prevent data loss while clearing the cache or repairing the app.
Clear the Local OneNote Cache
Deleting corrupted cache files forces OneNote to rebuild its data structure and often resolves persistent synchronization blocks.
The cache folder stores temporary files to speed up notebook loading. When these files become corrupted, they can completely halt the synchronization process and trigger the 0xE00012E3 error. Clearing it allows a fresh sync from OneDrive.
Ensure the OneNote desktop application is completely closed. You may need to check the system tray or Task Manager to ensure no background processes are running.
Press the Windows key + R to open the Run dialog. Type '%localappdata%\Microsoft\OneNote\16.0' and press Enter.
Locate the folder named 'cache', right-click it, and select Delete. Empty your Recycle Bin to ensure it is completely removed.
Open OneNote again. The application will take a few moments to rebuild the cache and download your notebooks from OneDrive. Check if the sync error is resolved.
Isolate Corrupted Sections via OneNote for the Web
Use the web version of OneNote to identify and recreate the specific section causing the recurring cache corruption.
Repair or Reinstall OneNote
Use Windows built-in app management tools to repair damaged installation files that might be causing persistent errors.
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- 1. Download the installer: Visit the official WPS Office website and download the free installation package for your operating system.
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Frequently Asked Questions
What does OneNote error 0xE00012E3 mean?
Error 0xE00012E3 indicates a synchronization failure between the OneNote desktop application and OneDrive. It is most commonly caused by a corrupted local cache folder or a damaged notebook section that prevents the application from properly reading and writing data.
Why does the sync error return after clearing the cache?
If the error returns after a cache wipe, it means a specific page, embedded file, or section within your notebook contains corrupted data. Every time OneNote attempts to download or upload this specific piece of data, the cache becomes corrupted again. You must identify and replace the problematic section.
How can I force OneNote to sync a specific notebook?
You can manually force a sync by right-clicking the notebook name in the left-hand panel of the OneNote desktop application and selecting 'Sync This Notebook Now'. Alternatively, you can press Shift+F9 while viewing the notebook.
How do I back up my unsynced OneNote pages?
If your pages refuse to sync to the cloud, you can back them up locally by going to File > Export in the OneNote desktop app and saving the section as a PDF or XPS file. You can also manually copy and paste the text into another program like Word or Notepad.
