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Resolving 'The receiving site can’t receive the oversized data chunk' Migration Error

16 threads Sep 9, 2025

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Encountering the error 'The receiving site can’t receive the oversized data chunk' during a site migration with the WPvivid Backup & Migration plugin can be a frustrating roadblock. This error typically occurs during the plugin's 'auto-migrate' process when the data packets being sent are larger than what the destination server is configured to handle.

Why This Error Happens

The auto-migration feature transfers your website's data in smaller pieces, or 'chunks,' to ensure stability. If the predefined chunk size in the plugin's settings is too large for the receiving server's configuration, the transfer will fail with this specific error message. This is a common issue related to server limits rather than a hard limit of the plugin itself.

How to Fix It

The most straightforward solution, as indicated by user reports, is to adjust the chunk size setting within the plugin.

  1. Navigate to the WPvivid plugin settings on your source website.
  2. Locate the setting for 'Chunk Size'.
  3. Reduce the value significantly. The plugin's error message specifically suggests setting it to 512 KB.
  4. Save your settings and restart the migration process.

Alternative Solution: Manual Migration

If adjusting the chunk size does not resolve the issue, a highly effective alternative is to use the manual backup and restore method. This process is slightly more hands-on but is often more reliable for large sites or when dealing with server compatibility issues.

  1. On your source site, use WPvivid to create a complete backup of your website.
  2. Download the backup files to your local computer from the WPvivid backup list.
  3. On your destination site, ensure you have a fresh WordPress installation and the WPvivid plugin installed.
  4. Use the WPvivid 'Upload and restore' function to upload the backup files from your computer and complete the restoration process.

This manual method bypasses the direct server-to-server communication that can cause the chunk error, as the transfer is handled through your browser.

Checking Server Requirements

While WPvivid does not impose a site size limit, successful migration depends on your hosting environment. If you continue to experience issues, it may be helpful to verify that both servers meet the recommended requirements for PHP memory limits (max_execution_time, memory_limit, etc.), which can also affect migration performance.

By following these steps, you should be able to overcome the oversized data chunk error and successfully migrate your website.

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