Knowledge

ERROR_DS_CANT_RETRIEVE_CHILD - 8422 (0x20E6)

The child object could not be retrieved.

Updated: Feb 21, 2026

Technical Background

ERROR_DS_CANT_RETRIEVE_CHILD is a specific error code in the Windows API, particularly relevant to operations involving Active Directory and LDAP. This error indicates that an attempt to retrieve a child object from a directory service failed.

Error Details

The error ERROR_DS_CANT_RETRIEVE_CHILD (0x20E6) signifies that the system encountered difficulties in accessing or retrieving a specific child object within a directory structure. This can occur during operations such as searching for, adding, or modifying entries in an Active Directory.

Common Causes

  • Invalid Parameter Values: The operation may have been performed with invalid parameters, leading to failure.
  • Incorrect Object Type: The operation might be attempting to retrieve a child object from the wrong type of parent entry (e.g., trying to access a directory as if it were a file).
  • Exceeding Limits: There could be limitations on the number of objects that can be retrieved in a single operation, which may have been exceeded.
  • Corrupted Data: The data structure or metadata associated with the object might be corrupted, preventing retrieval.

Real-World Context

This error is commonly encountered when working with Active Directory services and LDAP operations. It can occur during various directory management tasks such as adding a new user to a group, modifying attributes of an existing entry, or searching for specific objects within the directory hierarchy.

Is This Error Critical?

The criticality of this error depends on the context in which it occurs. In some cases, it may be recoverable with appropriate corrective actions; in others, it might indicate a more severe issue that requires administrative intervention.

How to Diagnose

  1. Review Operation Context: Ensure that the operation being performed is within the correct directory context.
  2. Validate Parameters: Verify that all parameters passed to the API are valid and correctly formatted.
  3. Confirm Object Types: Check that the parent object type matches the expected type for child objects.
  4. Verify Input Data: Validate the integrity of the data associated with the operation, ensuring no corruption exists.

How to Resolve

  1. Correct Parameter Usage: Ensure all parameters are correctly specified and valid.
  2. Adjust Operation Context: If the context is incorrect, adjust it to match the expected directory structure.
  3. Restore Data: If data corruption is suspected, restore from a backup or correct any issues with the data.
  4. Retry Operation with Valid Inputs: Perform the operation again using validated inputs.

Developer Notes

Developers should be aware that this error can occur due to various factors and should implement robust validation logic for parameters and context checks to mitigate such errors.

Related Errors

  • ERROR_DS_OBJECT_NOT_FOUND (0x2019): Indicates the object being sought does not exist.
  • ERROR_DS_NO_SUCH_OBJECT (0x2035): Similar to ERROR_DS_OBJECT_NOT_FOUND, but may be returned in different scenarios.

FAQ

Q: What causes ERROR_DS_CANT_RETRIEVE_CHILD?

A: Common causes include invalid parameters, incorrect object types, exceeding limits, and corrupted data.

Q: How can I prevent this error?

A: Ensure all parameters are valid, verify the correct context for operations, and maintain integrity of directory data.

Summary

ERROR_DS_CANT_RETRIEVE_CHILD (0x20E6) is a specific error code indicating failure to retrieve a child object from an Active Directory or LDAP structure. It can be caused by various factors such as invalid parameters, incorrect object types, and corrupted data. Proper validation and context checks are crucial for preventing this error.