Knowledge

ERROR_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT - 6811 (0x1A9B)

It is not possible to open a miniversion with modify access.

Updated: Feb 21, 2026

Technical Background

This error code is specific to the Windows operating system and indicates a failure in attempting to open a miniversion of a file or directory with modify access. Miniversions are used by certain file systems, such as ReFS, for maintaining historical versions of files.

Error Details

The ERROR_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT error (6811) is returned when the system cannot open a miniversion of a file or directory with modify access. This typically occurs due to constraints in the file system's implementation, such as limitations on the number of miniversions that can be opened simultaneously.

Common Causes

  • Exceeding Limits: The operation may fail if too many miniversions are open at once, exceeding the system-imposed limits.
  • Incorrect Object Type: The error might occur if an attempt is made to modify a directory instead of a file, as directories do not support miniversioning in this context.

Real-World Context

This error can be encountered when using APIs that require access to historical versions of files. For example, applications that need to revert changes or compare different versions of a file might encounter this error if the system's constraints are exceeded.

Is This Error Critical?

The criticality of this error depends on the application's requirements. If the operation is not essential, the application can handle the error by retrying with appropriate context or by using alternative methods to achieve its goals.

How to Diagnose

  1. Review Operation Context: Ensure that the operation is being performed in an environment where miniversions are supported and accessible.
  2. Validate Parameters: Verify that the file path and other parameters passed to the API are correct and valid.
  3. Confirm Object Types: Check whether the object type (file or directory) matches the expected usage context.
  4. Verify Input Data: Ensure that there is no corruption in the data being accessed, which could affect the operation's success.

How to Resolve

  1. Correct Parameter Usage: Ensure that the correct parameters are used for opening miniversions.
  2. Adjust Operation Context: If the error occurs due to exceeding limits, consider adjusting the context or retrying with a different approach.
  3. Restore Data: If data corruption is suspected, restore the file from a backup if available.
  4. Retry Operation with Valid Inputs: Attempt the operation again with valid inputs and ensure that all constraints are met.

Developer Notes

Developers should be aware of the limitations imposed by the file system when working with miniversions. Understanding these limitations can help in designing more robust applications that handle such errors gracefully.

Related Errors

  • ERROR_MINIVERSION_IN_USE: Indicates that a miniversion is already open and cannot be opened again.
  • ERROR_TOO_MANY_OPEN_MINIVERIONS: Occurs when the maximum number of open miniversions has been reached.

FAQ

Q: What does ERROR_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT mean?

A: It indicates that the system cannot open a miniversion of a file or directory with modify access.

Q: Can this error occur on any file system?

A: No, this error is specific to file systems that support miniversions, such as ReFS.

Q: How can I prevent this error from occurring?

A: Ensure that the operation context and parameters are correct, and do not exceed the system-imposed limits for opening miniversions.

Summary

The ERROR_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT (6811) is a specific error code indicating an inability to open a miniversion of a file or directory with modify access. Understanding this error and its causes can help in developing more robust applications that handle such scenarios effectively.