WSA_QOS_RESERVED_PETYPE - 11031 (0x2B17)
A reserved policy element was found in the QOS provider-specific buffer.
Updated: Feb 21, 2026
Technical Meaning
The error code WSA_QOS_RESERVED_PETYPE with the numeric value 11031 and hexadecimal representation 0x2B17 indicates that a reserved policy element was found in the Quality of Service (QoS) provider-specific buffer. This error typically arises when an application attempts to use or modify QoS settings, but encounters a policy element that is not recognized by the system.
Error Details
The WSA_QOS_RESERVED_PETYPE error suggests that there is a discrepancy between the expected and actual content of the QoS provider-specific buffer. This could be due to an invalid or unsupported policy element being present in the buffer, which causes the system to reject the operation.
Usage Context
This error can occur during network programming operations where Quality of Service (QoS) policies are being configured or queried. The error is specific to scenarios involving QoS settings and may be encountered when using functions such as SetIpInterfaceInfo or GetIpInterfaceInfo, which involve manipulating QoS-related information.
Developer Interpretation
Developers should interpret this error as an indication that the application attempted to use a policy element in the QoS provider-specific buffer that is not recognized by the system. This could be due to several factors, such as using deprecated or unsupported elements, or providing incorrect data types for the policy elements.
Related Errors
WSAEINVAL: Invalid argument passed to a socket function.WSAENOPROTOOPT: Option not supported for this protocol.WSAEPROTONOSUPPORT: Protocol not supported by socket.
FAQ
Q: What does the WSA_QOS_RESERVED_PETYPE error mean?
A: It indicates that a reserved policy element was found in the QoS provider-specific buffer, suggesting an invalid or unsupported policy element was used.
Q: How can I resolve this issue?
A: Ensure that all QoS-related parameters and elements are correctly specified according to the documentation. Verify that no deprecated or unsupported elements are being used.
Summary
The WSA_QOS_RESERVED_PETYPE error is a generic indication of an invalid policy element in the QoS provider-specific buffer. Developers should carefully check their usage of QoS-related functions and ensure all parameters are correctly specified to avoid this error.