RPC_S_NO_CONTEXT_AVAILABLE - 1765 (0x6E5)
No security context is available to allow impersonation.
Updated: Feb 21, 2026
Technical Meaning
The error code RPC_S_NO_CONTEXT_AVAILABLE with the numeric value 1765 and hexadecimal representation 0x6E5 indicates that there is no security context available to allow impersonation. This typically occurs in scenarios where a Windows API or RPC (Remote Procedure Call) service requires a specific security context for authentication but cannot obtain one.
Error Details
This error is related to the capability of an application or service to perform operations that require user-level security contexts, such as impersonating a client during remote procedure calls. The absence of a security context can prevent certain operations from being executed successfully.
Usage Context
The RPC_S_NO_CONTEXT_AVAILABLE error is commonly encountered in scenarios involving RPC services and applications that need to authenticate or impersonate users for secure communication. It may also appear when attempting to perform operations that require elevated privileges, such as administrative tasks.
Developer Interpretation
Developers should interpret this error code as an indication that the application or service lacks the necessary security context to proceed with the requested operation. This could be due to a failure in obtaining authentication credentials or insufficient permissions within the system's security model.
Related Errors
RPC_S_ACCESS_DENIED(1794, 0x6E2): Indicates that access is denied for the requested operation.RPC_S_INVALID_CONTEXT_HANDLE(1835, 0x72B): Occurs when an invalid context handle is used.
FAQ
Q: What causes RPC_S_NO_CONTEXT_AVAILABLE?
A: This error typically occurs due to a failure in obtaining a security context or insufficient permissions within the system's security model. It may also be caused by incorrect usage of APIs that require authentication contexts.
Q: How can I resolve this issue?
A: Ensure that your application has the necessary credentials and permissions to obtain a security context before performing operations that require impersonation. Verify that you are using the correct API calls and parameters for obtaining and managing security contexts.
Summary
The RPC_S_NO_CONTEXT_AVAILABLE error signifies that no security context is available, preventing certain operations from being executed successfully. Developers should ensure proper authentication and permission handling to avoid this issue.