ERROR_NO_SUCH_MEMBER - 1387 (0x56B)
A member could not be added to or removed from the local group because the member does not exist.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_NO_SUCH_MEMBER error code, with the numeric value of 1387 and the hexadecimal representation of 0x56B, indicates that a specified member could not be added to or removed from a local group because the member does not exist in the system.
Error Details
This error typically occurs during operations involving local groups on Windows systems. Local groups are collections of users or computers with specific permissions and access rights within an organizational unit (OU) or domain. The error suggests that the operation attempted to modify a group by adding or removing a member, but the specified member does not exist in the system.
Usage Context
This error is commonly encountered when performing administrative tasks such as managing user accounts, adjusting permissions, or modifying local security policies. It can also arise during script execution or automated processes that interact with local groups.
Developer Interpretation
Developers should interpret this error code to indicate a failure in the operation due to an invalid member identifier. The system cannot find the specified member within the context of the group being modified, which could be due to several reasons such as incorrect user name or ID, or the member not existing in the local domain.
Related Errors
ERROR_MEMBER_IN_ALIAS(0x56C) - Indicates that a member is part of an alias and cannot be added directly.ERROR_NO_SUCH_USER(0x538) - Suggests that the user specified does not exist in the system.
FAQ
Q: What causes this error?
A: The primary cause is attempting to add or remove a member from a local group where the member does not exist. This can be due to incorrect user names, IDs, or the member being part of an alias rather than directly in the group.
Q: How can I resolve this issue?
A: Ensure that the correct user name or ID is used and that the member exists within the local domain before attempting the operation again.
Summary
The ERROR_NO_SUCH_MEMBER error code signifies a failure to add or remove a non-existent member from a local group. Developers should validate input parameters and ensure that all members specified in operations exist within the system context.