RPC_S_SEND_INCOMPLETE - 1913 (0x779)
Some data remains to be sent in the request buffer.
Updated: Feb 21, 2026
Technical Meaning
The RPC_S_SEND_INCOMPLETE error code indicates that the network communication operation did not complete successfully because some data remains to be sent in the request buffer. This typically occurs when a client application initiates a remote procedure call (RPC) and sends part of the required data, but the full amount is not transmitted before the operation completes.
Error Details
The numeric error code for this condition is 1913, which translates to 0x779 in hexadecimal. This error suggests that there was an issue with the network transmission process, specifically related to the state of the request buffer at the time the operation terminated.
Usage Context
This error can occur in various scenarios where data is being sent over a network using RPCs. Common contexts include client-server interactions, distributed applications, and networked services that rely on remote procedure calls for communication.
Developer Interpretation
When encountering this error, developers should understand that the operation did not complete as expected due to incomplete data transmission. This can lead to partial or incorrect processing of the RPC request by the server. Developers are advised to ensure that all required data is fully sent before concluding an RPC operation.
Common Causes
- Invalid Parameter Values: Sending insufficient or improperly formatted data in the request buffer.
- Exceeding Limits: Attempting to send more data than can fit within the allocated buffer size.
- Corrupted Data: Incomplete transmission due to network issues, such as packet loss or connection interruptions.
Real-World Context
In a typical client-server application, if an RPC operation is initiated and the server receives only part of the expected request data, it may fail to process the request correctly. This can result in partial execution of the intended function or incorrect results being returned to the client.
Is This Error Critical?
The criticality of this error depends on the specific application and its requirements. In scenarios where full data integrity is essential for correct operation, this error could be considered critical as it may lead to partial or incorrect processing of requests.
How to Diagnose
To diagnose RPC_S_SEND_INCOMPLETE, developers should:
- Review Operation Context: Ensure that the RPC operation context is correctly set up and that all necessary data is available before initiating the call.
- Validate Parameters: Verify that all parameters passed in the request buffer are complete and valid.
- Confirm Object Types: Check that the object types being used are appropriate for the intended operation.
- Verify Input Data: Ensure that the input data is fully transmitted without any interruptions or losses during network transmission.
How to Resolve
To resolve RPC_S_SEND_INCOMPLETE, developers should:
- Correct Parameter Usage: Ensure all required parameters are correctly and completely specified in the request buffer.
- Adjust Operation Context: If the operation context includes retries, ensure that they are configured to handle partial data transmission appropriately.
- Restore Data: In cases where data corruption is suspected, attempt to retransmit the data or use error recovery mechanisms if available.
Developer Notes
Developers should consider implementing retry logic for RPC operations that may be prone to RPC_S_SEND_INCOMPLETE errors. Additionally, logging and monitoring can help in identifying patterns of incomplete transmission and addressing underlying issues such as network instability or resource constraints.
Related Errors
- RPC_S_CALL_FAILED: Indicates a failure during the execution of an RPC call.
- RPC_S_INVALID_BINDING: Occurs when the binding handle is invalid for the operation.
- WSAEWOULDBLOCK: Network error indicating that the operation would block and should be retried.
FAQ
Q: What does RPC_S_SEND_INCOMPLETE mean?
A: It indicates that some data remains to be sent in the request buffer during an RPC operation, leading to incomplete transmission.
Q: How can I prevent this error?
A: Ensure all required data is fully transmitted before concluding the RPC operation and implement retry logic if necessary.
Summary
The RPC_S_SEND_INCOMPLETE error code signifies that not all expected data was sent during an RPC request. Developers should ensure complete data transmission and consider implementing robust error handling to manage this condition effectively.