Knowledge

ERROR_TOO_MANY_LUIDS_REQUESTED - 1333 (0x535)

Too many local user identifiers (LUIDs) were requested at one time.

Updated: Feb 21, 2026

Technical Background

The error code ERROR_TOO_MANY_LUIDS_REQUESTED is a specific Windows API error that indicates an attempt to request more local user identifiers (LUIDs) than the system can handle at one time. LUIDs are used in various security-related operations, such as managing access tokens and security descriptors.

Error Details

The error ERROR_TOO_MANY_LUIDS_REQUESTED is returned when a function or API call attempts to allocate more LUIDs than the system's current limit allows. This can occur in scenarios where multiple requests for LUIDs are made simultaneously, overwhelming the system resources allocated for managing these identifiers.

Common Causes

  • Exceeding Limits: The number of LUIDs requested exceeds the maximum allowed by the system at a given time.
  • Concurrency Issues: Multiple threads or processes concurrently requesting LUIDs can lead to this error if the limit is not sufficient to handle such concurrency.

Real-World Context

This error typically arises in scenarios involving security-related operations, such as creating multiple access tokens or managing complex security descriptors. It highlights a limitation in the system's ability to allocate and manage LUIDs efficiently under high-concurrency conditions.

Is This Error Critical?

The criticality of this error depends on the context in which it occurs. In most cases, it is not a catastrophic failure but rather an indication that the operation should be retried with fewer requests or at a different time to avoid overwhelming system resources.

How to Diagnose

To diagnose ERROR_TOO_MANY_LUIDS_REQUESTED, follow these steps:

  1. Review Operation Context: Ensure that the operation is not being performed in an environment where high concurrency might be causing resource contention.
  2. Validate Parameters: Check if the number of LUIDs requested is within the system's limits. Refer to the documentation for specific functions to understand their limitations.
  3. Confirm Object Types: Verify that the correct object types are being used and that they align with the expected behavior of the function or API call.
  4. Verify Input Data: Ensure that all input data, including LUIDs, is valid and correctly formatted.
  5. Check Limits or Constraints: Confirm that the system's limits for LUID allocation have not been exceeded.

How to Resolve

To resolve ERROR_TOO_MANY_LUIDS_REQUESTED, consider the following actions:

  1. Correct Parameter Usage: Adjust the number of LUIDs requested to be within the system's limit.
  2. Adjust Operation Context: If high concurrency is a factor, consider spreading out the requests over time or reducing the number of concurrent operations.
  3. Restore Data: If data corruption or invalid state is suspected, restore the system to a known good state before retrying the operation.
  4. Retry Operation with Valid Inputs: Attempt the operation again with valid inputs and ensure that all parameters are correctly set.

Developer Notes

When developing applications that interact with Windows APIs involving LUIDs, it is crucial to understand the limitations of the system and design operations to avoid overwhelming the resource limits. Proper error handling and retry mechanisms can help mitigate issues related to ERROR_TOO_MANY_LUIDS_REQUESTED.

Related Errors

  • ERROR_INSUFFICIENT_BUFFER: Indicates that a buffer provided for an operation was too small to hold all required data.
  • ERROR_INVALID_PARAMETER: Occurs when one or more parameters passed in a function call are not valid.
  • ERROR_NOT_ENOUGH_MEMORY: Indicates that the system is out of memory and cannot allocate additional resources.

FAQ

Q: What does ERROR_TOO_MANY_LUIDS_REQUESTED mean?

A: It indicates an attempt to request more local user identifiers (LUIDs) than the system can handle at one time.

Q: How can I prevent this error from occurring?

A: Ensure that the number of LUIDs requested is within the system's limits and avoid high-concurrency scenarios where possible.

Q: Can this error be critical for my application?

A: Generally, it is not a catastrophic failure but an indication that the operation should be adjusted to fit within system limitations.

Summary

ERROR_TOO_MANY_LUIDS_REQUESTED is a specific Windows API error indicating an attempt to request more LUIDs than the system can handle. It highlights resource limits and requires careful management of concurrent operations involving security-related identifiers. Proper handling and design can prevent this issue from occurring.