Knowledge

RPC_X_PIPE_CLOSED - 1916 (0x77C)

The RPC pipe object has already been closed.

Updated: Feb 21, 2026

Introduction

The RPC_X_PIPE_CLOSED error code, with the numeric value of 1916 (0x77C), indicates that an attempt was made to use a Remote Procedure Call (RPC) pipe object after it has been closed. This article provides detailed information on this specific error and its implications for developers.

Technical Background

Remote Procedure Calls (RPCs) are a protocol used in distributed computing environments, allowing applications running on different machines to call procedures as if they were local. RPC pipes are a mechanism within the Windows API that facilitate communication between processes or across network boundaries.

Error Details

Meaning of the Error Code

The RPC_X_PIPE_CLOSED error code is returned when an operation attempts to use a pipe object after it has been closed. This can occur in various scenarios, such as attempting to send data over a pipe that no longer exists or trying to receive data from a pipe that has already terminated.

Context Dependency

This error is context-dependent and may arise due to improper handling of RPC pipes. Developers must ensure that all operations on an RPC pipe are completed before closing it, and subsequent attempts to use the pipe should be handled appropriately.

Common Causes

  • Invalid Parameter Values: Attempting to send or receive data over a closed pipe can result in this error.
  • Incorrect Object Type: Using a non-pipe object where a pipe is expected can lead to this issue.
  • Exceeding Limits: In rare cases, exceeding certain limits related to RPC pipes might trigger this error.

    Real-World Context

    In practical scenarios, developers may encounter RPC_X_PIPE_CLOSED when implementing networked applications or distributed systems that rely on RPC communication. Proper handling of pipe objects is crucial to avoid such errors and ensure the robustness of the application.

    Is This Error Critical?

    The criticality of this error depends on the context in which it occurs. In most cases, it indicates a logical flow issue rather than a severe system failure. However, if not handled properly, it can lead to application crashes or unexpected behavior.

    How to Diagnose

    Reviewing Operation Context

    Ensure that all operations related to the RPC pipe are completed before closing it. Verify that no further operations are attempted on the closed pipe.

    Validating Parameters

    Check the parameters passed to RPC functions to ensure they match the expected types and values. Ensure that the pipe object is correctly identified and used.

    Confirming Object Types

    Verify that the object being operated upon is indeed an RPC pipe and not another type of object. Incorrect object types can lead to unexpected behavior and errors.

    How to Resolve

  • Correct Parameter Usage: Ensure that all parameters passed to RPC functions are valid and correctly typed.
  • Adjust Operation Context: Make sure that operations on the RPC pipe are completed before closing it, and no further operations are attempted afterward.
  • Restore Data: If data corruption is suspected, restore or reinitialize the state of the pipe object as needed.
  • Retry Operation with Valid Inputs: Attempt to perform the operation again with valid inputs if the issue persists after addressing potential causes.

    Developer Notes

    Developers should be mindful of the lifecycle of RPC pipes and ensure that all operations are properly managed. Proper error handling can help mitigate issues related to RPC_X_PIPE_CLOSED errors.

    Related Errors

  • RPC_X_PIPE_EOF: Indicates an end-of-file condition on a pipe, which might occur before this error if data is being read from the pipe.
  • RPC_X_PIPE_ERROR: A generic error that may be returned for various issues with RPC pipes, including RPC_X_PIPE_CLOSED.

    FAQ

    Q: What does the RPC_X_PIPE_CLOSED error mean?

    A: The RPC_X_PIPE_CLOSED error indicates an attempt to use a closed RPC pipe object. This typically occurs when operations are attempted on a pipe after it has been properly closed.

    Q: How can I prevent this error from occurring?

    A: Ensure that all operations related to the RPC pipe are completed before closing it, and do not attempt further operations on the closed pipe.

    Q: Can this error be critical for my application?

    A: The severity of this error depends on your application's context. In most cases, it is a logical flow issue rather than a critical system failure.

    Summary

    The RPC_X_PIPE_CLOSED error code (1916) indicates an attempt to use a closed RPC pipe object. Proper handling of RPC pipes and their lifecycle is crucial to avoid this error. Developers should ensure that all operations are completed before closing the pipe and handle any subsequent attempts appropriately.