RPC_X_SS_HANDLES_MISMATCH - 1778 (0x6F2)
The binding handles passed to a remote procedure call do not match.
Updated: Feb 21, 2026
Introduction
The error code RPC_X_SS_HANDLES_MISMATCH (1778, 0x6F2) indicates a specific technical issue related to remote procedure calls in the Windows operating system. This article provides an interpretation of this error and its context for developers.
Technical Meaning
This error occurs when binding handles passed to a remote procedure call do not match the expected values. Binding handles are used to establish communication between different processes or systems, ensuring that the correct resources are accessed during the execution of a remote procedure call (RPC).
Error Details
The RPC_X_SS_HANDLES_MISMATCH error is returned when there is a mismatch in the binding handles passed to an RPC function. This can occur due to various reasons such as incorrect parameter values, invalid object types, or exceeding system limits.
Usage Context
This error typically arises in scenarios where multiple processes are communicating over a network using RPC mechanisms. It may be encountered when attempting to call remote procedures that require specific binding handles for proper execution.
Developer Interpretation
When encountering the RPC_X_SS_HANDLES_MISMATCH error, developers should review the context of the operation and ensure that all parameters passed to the RPC function are correct. This includes verifying the types of objects being referenced and ensuring that the binding handles match the expected values for the remote procedure call.
Related Errors
- RPC_S_INVALID_BINDING: Indicates an invalid binding handle.
- RPC_X_SS_UUID_MISMATCH: Occurs when UUIDs do not match during a remote procedure call.
FAQ
Q: What does the RPC_X_SS_HANDLES_MISMATCH error mean?
A: This error indicates that the binding handles passed to a remote procedure call do not match the expected values, leading to an incorrect operation or failure of the RPC function.
Q: How can I resolve this issue?
A: Review the parameters and context of your remote procedure calls. Ensure that all binding handles are correctly set and match the expected values for the specific RPC function being called.
Summary
The RPC_X_SS_HANDLES_MISMATCH error is a specific technical issue related to remote procedure calls in Windows. It occurs when there is a mismatch between the binding handles passed to an RPC function and the expected values. Developers should carefully review their code and ensure that all parameters are correctly set to avoid this error.