Knowledge

ERROR_INVALID_VERIFY_SWITCH - 118 (0x76)

The verify-on-write switch parameter value is not correct.

Updated: Feb 21, 2026

Technical Meaning

The ERROR_INVALID_VERIFY_SWITCH error code indicates that a parameter passed to a Windows API function related to the verify-on-write feature is not valid. This typically occurs when an incorrect value or state for the verify-on-write switch has been specified.

Error Details

This error is specific to operations involving file system integrity checks and data validation mechanisms, particularly those enabled by the verify-on-write functionality in Windows.

Common Causes

  • Invalid Parameter Values: The parameter passed to a function that controls the verify-on-write feature may contain an incorrect value or state. For example, attempting to enable verify-on-write when it is already active could trigger this error.
  • Incorrect Object Type: The operation being performed might be inappropriate for the object type involved. Verify-on-write features are typically associated with file operations and not directory or path operations.

Real-World Context

Verify-on-write is a feature that ensures data integrity by checking the checksum of written data against expected values, which can help detect corruption during write operations. This error would be relevant in scenarios where such checks are being performed or configured.

Is This Error Critical?

The criticality of this error depends on the specific operation and context. While it does not necessarily indicate a catastrophic failure, it may prevent certain file system integrity checks from completing successfully, potentially leading to data inconsistencies if left unaddressed.

How to Diagnose

To diagnose this issue, follow these steps:

  1. Review Operation Context: Ensure that the operation being performed is appropriate for verify-on-write features. Verify-on-write operations are typically related to file writes and not directory or path operations.
  2. Validate Parameters: Check the parameters passed to functions controlling verify-on-write. Ensure they contain valid values, such as enabling or disabling the feature correctly.
  3. Confirm Object Types: Confirm that the object types involved in the operation (e.g., files) are compatible with verify-on-write features.
  4. Verify Input Data: If applicable, check the input data for any corruption or inconsistencies that might affect the verify-on-write process.

How to Resolve

To resolve this issue, take these actions:

  • Correct Parameter Usage: Ensure that all parameters passed to functions related to verify-on-write are set correctly. For example, use FILE_FLAG_WRITE_THROUGH appropriately when enabling verify-on-write.
  • Adjust Operation Context: If the operation is not appropriate for verify-on-write features, adjust the context or choose a different operation type.
  • Restore Data: If data corruption is suspected, restore from backups or correct any known issues before retrying the operation.
  • Retry Operation with Valid Inputs: After addressing the identified causes, retry the operation to ensure that it completes successfully without triggering this error.

Developer Notes

When working with verify-on-write features in Windows, always validate parameters and ensure that operations are appropriate for the object types involved. Consistent use of correct flags and values can help prevent such errors from occurring.

Related Errors

FAQ

Q: What does ERROR_INVALID_VERIFY_SWITCH mean?

A: It indicates that a parameter passed to a function related to verify-on-write is not valid, such as an incorrect value or state.

Q: How can I prevent this error from occurring?

A: Ensure that all parameters are correctly set and that the operation being performed is appropriate for the object type involved. Validate input data and use correct flags when working with verify-on-write features.

Q: Is this error critical to system stability?

A: While it does not necessarily indicate a catastrophic failure, it may prevent certain file system integrity checks from completing successfully, potentially leading to data inconsistencies if left unaddressed.

Summary

The ERROR_INVALID_VERIFY_SWITCH error code is specific to operations involving verify-on-write features in the Windows API. It indicates that an incorrect parameter value or state has been specified for these functions. By carefully validating parameters and ensuring appropriate operation context, developers can prevent this error from occurring and maintain file system integrity.