WinTrouble

How to fix ERROR_CLOUD_FILE_REQUEST_TIMEOUT (426)

Code:426 (0x1AA)
Teracopy: Reports error

Description

The cloud operation was not completed before the time-out period expired.

This is a general-purpose failure code from the Windows Cloud Files API, indicating that OneDrive or another cloud sync provider takes too long to respond.

Causes

  • A transient server-side issue with OneDrive or Microsoft's cloud infrastructure.
  • The file being accessed is locked by another process (e.g., open in Word or Excel) while a sync operation is attempted.
  • Corrupted file metadata in the OneDrive sync database.
  • A sync conflict between the local and cloud copy of a file.
  • OneDrive is in a bad state following a crash, update, or improper shutdown.
  • The file or folder name contains unsupported characters or exceeds OneDrive's path length limits.

Solutions

Retry the Operation

Transient failures often resolve on their own. Wait a minute and try the operation again, or restart OneDrive and reattempt.

Verify Internet Connectivity

Open a browser and confirm general internet access is working. Try navigating to onedrive.live.com to verify OneDrive's servers are reachable.

Close Files Before Syncing

Ensure the affected file is not open in any application. Save and close the document, then allow OneDrive to sync before accessing it again.

Resolve Sync Conflicts

Click the OneDrive taskbar icon and open the activity feed. Look for any files flagged with a sync conflict icon and resolve them by keeping one version or merging changes manually.

Check File Name and Path

Ensure the file or folder name does not contain characters unsupported by OneDrive (such as < > : " / \ | ? *) and that the full path length does not exceed 400 characters. Rename or move the file if needed.

Reset OneDrive

Press Win + R and run:

%localappdata%\Microsoft\OneDrive\onedrive.exe /reset

This rebuilds OneDrive's local sync database without deleting your files.

Unlink and Re-link Your Account

Open OneDrive settings, go to Account > Unlink this PC, then sign back in. This forces a full resync and can clear persistent operation failures.

Run System File Checker

Open Command Prompt as Administrator and run:

sfc /scannow

Corrupted Windows system files can sometimes cause cloud file operations to fail without a specific reason.