Knowledge

ERROR_INVALID_SID - 1337 (0x539)

The security ID structure is invalid.

Updated: Feb 21, 2026

Technical Meaning

The ERROR_INVALID_SID error code indicates that a security identifier (SID) provided to an operating system function is not valid. A SID is used in Windows for identifying users and groups, and it plays a crucial role in access control mechanisms.

Error Details

This error typically occurs when a function expecting a valid SID receives one that does not conform to the expected format or structure. The SID is a string of characters that uniquely identifies a security principal (user or group) within the system's security database.

Usage Context

The ERROR_INVALID_SID can be encountered in various scenarios, such as when attempting to grant permissions, authenticate users, or manage access control lists (ACLs). It often indicates an issue with the input provided by the application or a misconfiguration in the system settings.

Developer Interpretation

When encountering this error, developers should ensure that the SID passed to any API function is correctly formatted and valid. This includes verifying the format of the string and ensuring it corresponds to a known security principal within the system.

Related Errors

  • ERROR_INVALID_PARAMETER: Occurs when an invalid parameter is provided to a function.
  • ERROR_ACCESS_DENIED: May occur if the SID is valid but does not have sufficient permissions for the requested operation.
  • ERROR_NO_SUCH_USER: Indicates that the user or group specified by the SID does not exist in the system.

FAQ

Q: What causes ERROR_INVALID_SID?

A: The error typically occurs due to an invalid format of the SID string provided to a function. It could also be caused by attempting to use a SID for a security principal that does not exist or is incorrectly formatted.

Q: How can I resolve this issue?

A: Ensure that the SID passed to any API function is correctly formatted and corresponds to an existing security principal in the system. Verify the input data and check for any misconfigurations in your application or system settings.

Summary

The ERROR_INVALID_SID error code indicates a problem with the format or existence of a provided SID, which is critical for access control mechanisms in Windows. Developers should ensure that all SIDs used are valid and correctly formatted to avoid this issue.