RPC_S_UNSUPPORTED_TRANS_SYN - 1730 (0x6C2)
The transfer syntax is not supported by the RPC server.
Updated: Feb 21, 2026
Technical Meaning
The error code RPC_S_UNSUPPORTED_TRANS_SYN indicates that the transfer syntax used in a Remote Procedure Call (RPC) operation is not supported by the server. This typically occurs when an unsupported encoding or data format is attempted during the RPC communication.
Error Details
- Error Name: RPC_S_UNSUPPORTED_TRANS_SYN
- Numeric Code: 1730
- Hex Code: 0x6C2
- Short Description: The transfer syntax is not supported by the RPC server.
This error suggests that there is a mismatch between the client and server regarding the data encoding or format used in the RPC call. Commonly, this can occur due to differences in protocol versions or implementation specifics.
Usage Context
The RPC_S_UNSUPPORTED_TRANS_SYN error typically arises in scenarios where an application attempts to communicate with a remote service using a specific transfer syntax that is not recognized by the server. This could happen during network communication, inter-process communication (IPC), or when invoking remote procedures over a network.
Developer Interpretation
Developers should ensure that the client and server are configured to use compatible transfer syntaxes for RPC operations. Commonly, this involves verifying the protocol version being used and ensuring that both ends of the communication support the same encoding mechanisms. Developers may need to consult documentation or configuration settings related to the specific RPC service in question.
Related Errors
RPC_S_INVALID_BINDING(1720, 0x6C4): The binding handle is invalid.RPC_S_NO_CONTEXTanmariaDB(1731, 0x6C3): No security context exists for this call.RPC_S_CALL_FAILED(1735, 0x6C7): The RPC server terminated the operation.
FAQ
Q: What does the error code RPC_S_UNSUPPORTED_TRANS_SYN mean?
A: It indicates that an unsupported transfer syntax was used in an RPC call. Ensure both client and server support the same encoding mechanisms.
Q: How can I resolve this issue?
A: Verify that the protocol version and transfer syntax are compatible between the client and server. Consult relevant documentation for specific configuration details.
Summary
The RPC_S_UNSUPPORTED_TRANS_SYN error signifies a mismatch in transfer syntax during an RPC operation, indicating that the server does not recognize the encoding or data format used by the client. Developers should ensure compatibility of protocol versions and transfer syntaxes to avoid this issue.