RPC_S_CANNOT_SUPPORT - 1764 (0x6E4)
The requested operation is not supported.
Updated: Feb 21, 2026
Technical Meaning
The error code RPC_S_CANNOT_SUPPORT indicates that the operation requested by a client is not supported by the server or service. This typically occurs in scenarios involving Remote Procedure Calls (RPC) where the server cannot fulfill the request due to limitations.
Error Details
- Error Name: RPC_S_CANNOT_SUPPORT
- Numeric Code: 1764
- Hex Code: 0x6E4
- Short Description: The requested operation is not supported.
This error suggests that there are constraints or limitations on the operations that can be performed, which may include unsupported protocol versions, service capabilities, or specific RPC methods.
Usage Context
The RPC_S_CANNOT_SUPPORT error code is commonly encountered in environments where clients and servers communicate using Remote Procedure Call (RPC) protocols. It is often returned by RPC services when a client attempts to perform an operation that the server does not support.
Developer Interpretation
Developers should interpret this error as an indication that the requested operation cannot be performed due to limitations on the service or protocol being used. This could be due to several factors, such as unsupported method IDs, invalid parameter values, or limitations in the RPC service's capabilities.
Related Errors
- RPC_S_SERVER_UNAVAILABLE: The server is not available for processing requests.
- RPC_S_INVALID_BINDING: The binding handle passed by the client is invalid.
- RPC_S_NO_CONTEXTanmariaDB: There is no valid context associated with the request.
FAQ
Q: What does RPC_S_CANNOT_SUPPORT mean?
A: It indicates that the requested operation cannot be supported by the server or service due to limitations.
Q: How can I resolve this error?
A: Ensure that the client and server are using compatible versions of the protocol, and check if the specific operation is supported by the server's implementation.
Summary
The RPC_S_CANNOT_SUPPORT error code signifies that a requested operation cannot be performed due to limitations on the service or protocol. Developers should focus on ensuring compatibility between clients and servers and verifying that all operations are within the supported scope of the RPC service.