⚠️ 3 verified solutions available for Error 111 — Last updated 2026-03-13
Error 111 📋

How to Fix ERROR_BUFFER_OVERFLOW (Error 111)

The ERROR_BUFFER_OVERFLOW error, also known as Error 111, occurs when a file name exceeds the maximum allowed length. This error can prevent files from being accessed or transferred. It's a common issue in Windows systems, especially when working with long file paths or names.

🏷️ Code: 111 📛 ERROR_BUFFER_OVERFLOW 📅 Updated: 2026-03-13 ⏱️ 3 Solutions

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📑 Table of Contents
What is Error 111? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 111?

The ERROR_BUFFER_OVERFLOW error is triggered when the file name or path exceeds the maximum buffer size allocated by the system. This can happen when a file is named with an excessively long string of characters, or when a file is stored in a deeply nested directory structure. As a result, the system cannot process the file name, leading to the Error 111 message. This error can have significant impacts on system functionality, particularly when it affects critical files or applications. In some cases, it may even prevent the system from booting up or accessing important data. The error can also occur when using certain software or scripts that generate long file names or paths, such as automated backup tools or data migration scripts. Furthermore, the error can be triggered by malware or virus infections that modify file names or paths to exceed the maximum allowed length. In addition, the error can also occur due to configuration issues or corruption in the system's file system or registry.

⚠️ Common Causes

  • Exceedingly long file names or paths
  • Deeply nested directory structures
  • Software or script-generated long file names
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✅ Step-by-Step Solutions

1 Shorten the file name
  1. Identify the file causing the error
  2. Rename the file to a shorter name
  3. Verify the file can be accessed without errors
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2 Modify the directory structure
  1. Identify the deeply nested directory
  2. Reorganize the directory structure to reduce nesting
  3. Verify the error is resolved
3 Use the Windows Registry to increase buffer size
  1. Open the Windows Registry Editor
  2. Navigate to the relevant registry key
  3. Increase the buffer size to accommodate longer file names

🛡️ Prevention Tips

  • Use short and descriptive file names
  • Avoid deeply nested directory structures
  • Regularly scan for malware and viruses
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Last updated: 2026-03-13
📖
Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-13.
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