Knowledge

RPC_S_NO_PROTSEQS - 1719 (0x6B7)

There are no protocol sequences.

Updated: Feb 21, 2026

Introduction

The RPC_S_NO_PROTSEQS error, with the numeric value of 1719 (0x6B7), is a specific return code from Windows API functions. This article provides an in-depth explanation and interpretation of this error.

Technical Meaning

This error indicates that there are no protocol sequences available for the requested operation. Protocol sequences refer to the set of protocols required to establish communication between different components or services within a networked environment.

Error Details

The RPC_S_NO_PROTSEQS error is typically encountered when an application attempts to perform an operation that requires specific protocol sequences, but none are available in the current context. This can occur due to various reasons such as incorrect configuration, missing dependencies, or limitations within the system.

Usage Context

This error code is commonly used in Remote Procedure Call (RPC) operations where certain protocols must be present for successful communication. It may also appear in scenarios involving network services and inter-process communication.

Developer Interpretation

When encountering this error, developers should consider the following:

  • Protocol Availability: Ensure that all necessary protocol sequences are correctly configured and available within the system.
  • Configuration Check: Verify the configuration settings of related services or components to ensure they support the required protocols.
  • Dependency Management: Check for any missing dependencies or libraries that might be preventing the availability of certain protocols.

    Related Errors

  • RPC_S_INVALID_BINDING: Indicates an invalid binding handle, which can sometimes lead to RPC_S_NO_PROTSEQS if the binding does not include the required protocol sequences.
  • RPC_S_CALL_FAILED: May indicate a failure in the RPC call that could be related to missing or incorrect protocol sequences.

    FAQ

    Q: What causes the RPC_S_NO_PROTSEQS error?

    A: The error can occur due to missing or incorrectly configured protocol sequences required for the operation. It may also arise from issues with network services or dependencies.

    Q: How can I resolve this issue?

    A: Ensure that all necessary protocols are correctly set up and available in the system. Check configuration settings, verify dependencies, and ensure proper service configurations.

    Summary

    The RPC_S_NO_PROTSEQS error code signifies a lack of required protocol sequences for an operation. Developers should focus on ensuring correct protocol availability and configuration to avoid this issue.