Fix Unknown Error When Opening OneDrive PDFs in iOS App
Question details
The user encounters an unknown error when attempting to open PDF files stored in OneDrive via the Locations section of an iOS PDF reader app.
- Product
- iOS PDF App
- Device & OS
- iOS
- Scenario
- Accessing and reading PDF documents stored in OneDrive through a third-party PDF application on an iPhone or iPad.
- Observed behavior
- OneDrive fails to open from the Locations menu, and an unknown error message prevents the user from accessing their PDF files.
Verify that your iPhone or iPad has a stable internet connection and ensure that you are successfully logged into the official OneDrive app on your device.
Update Software and Reconnect OneDrive
Refreshing the connection between iOS and cloud services while ensuring your software is up to date often resolves unknown sync errors.
Cloud storage integrations in iOS rely heavily on background syncing and authentication tokens. When an app or the operating system is outdated, or if a token expires, it can trigger an unknown error when fetching files.
Open the App Store on your iPhone or iPad, search for your PDF reader app, and tap 'Update' to install the latest version.
Navigate to Settings > General > Software Update and check if a new iOS version is available. Install it if prompted.
Turn your iPhone or iPad off completely, wait a few seconds, and turn it back on to clear any temporary system glitches.
Open the iOS Files app, tap the Browse tab, tap the three dots in the top right corner, and select 'Edit'. Toggle OneDrive off, then back on, and sign in again if requested.
Isolate the Issue to OneDrive
Determine whether the error is specific to OneDrive or if the PDF application is struggling to open files from any location.
Open OneDrive PDFs Smoothly with WPS Office
Avoid frustrating iOS connection errors by using WPS Office. Our powerful built-in PDF reader connects effortlessly to OneDrive, allowing you to view, edit, and annotate your PDF files without interruption.
- 1. Install WPS Office: Download and install WPS Office from the App Store on your iPhone or iPad.
- 2. Add Cloud Storage: Open WPS Office, navigate to the 'Open' or 'Cloud' tab at the bottom, and select 'Add Cloud Storage'.
- 3. Connect to OneDrive: Choose 'OneDrive' from the list, log in with your Microsoft credentials, and grant access.
- 4. Open your PDF: Tap your newly added OneDrive folder to browse and open your PDF files directly without relying on external location integrations.
Frequently Asked Questions
Why does my iOS PDF app say 'Unknown Error' when opening cloud files?
This usually happens due to a sync failure between the third-party app and the iOS Files app integration, or because of an expired authentication token with your cloud storage provider.
Can I access OneDrive files directly from the iOS Files app instead?
Yes, you can bypass third-party app location menus by opening the built-in iOS Files app, tapping the Browse tab, and selecting OneDrive under Locations to view and open your PDFs.
How do I refresh my OneDrive connection on my iPad or iPhone?
You can refresh the connection by opening the official OneDrive app, signing out, and signing back in. Additionally, toggling OneDrive off and on in the iOS Files app's 'Edit' menu under Locations will force a refresh.
