Knowledge

ERROR_LOG_POLICY_INVALID - 6621 (0x19DD)

The installed set of policies on the log is invalid.

Updated: Feb 21, 2026

Technical Meaning

The ERROR_LOG_POLICY_INVALID error code (6621, 0x19DD) indicates that the system has encountered an issue with the configuration or policies applied to a log. This error suggests that the current policy settings are not valid and need to be corrected.

Error Details

This error typically occurs when attempting to configure or manage logs in Windows, such as during the setup of security policies, event logging rules, or other related operations. The specific context can vary depending on the application or service interacting with the log system.

Usage Context

The ERROR_LOG_POLICY_INVALID error is commonly encountered in scenarios where log management features are utilized, including but not limited to:

  • Configuring event logs
  • Setting up security policies for logging
  • Applying custom log rules and filters
  • Managing log retention policies

    Developer Interpretation

    When encountering this error, developers should interpret it as a signal that the current policy settings or configuration parameters are invalid. This could be due to incorrect values, unsupported operations, or conflicts with existing system configurations.

    Common Causes

  • Invalid parameter values: Incorrectly specified policy settings or parameters.
  • Incorrect object type: Attempting to apply policies to an inappropriate log type (e.g., applying a file system policy to a network log).
  • Exceeding limits: Reaching the maximum number of allowed policies or configurations.

    Related Errors

  • ERROR_INVALID_PARAMETER (1258, 0x4F6): Indicates that one or more parameters passed in a function call are invalid.
  • ERROR_LOG_FILE_FULL (703, 0x2C5): Suggests that the log file is full and cannot accommodate additional entries due to policy constraints.

    FAQ

    Q: What does ERROR_LOG_POLICY_INVALID mean?

    A: It indicates an issue with the current policy settings on a log. The configuration parameters are invalid or unsupported.

    Q: How can I resolve this error?

    A: Review and correct the policy settings, ensuring that all parameters are valid and appropriate for the intended use case.

    Summary

    The ERROR_LOG_POLICY_INVALID error (6621, 0x19DD) is a generic indication of an invalid log policy configuration. Developers should focus on validating input parameters and ensuring compliance with system policies when encountering this error.