RPC_S_INVALID_BOUND - 1734 (0x6C6)
The array bounds are invalid.
Updated: Feb 21, 2026
Technical Background
The RPC_S_INVALID_BOUND error code is a specific Remote Procedure Call (RPC) error that indicates an issue with the bounds of an array used in an RPC operation. This error typically arises when an application attempts to access memory outside the valid range of an array, which can lead to undefined behavior or crashes.
Error Details
The RPC_S_INVALID_BOUND error is a generic return code indicating that the operation encountered invalid bounds for an array. In the context of RPC, this usually means that the client or server attempted to access memory outside the allocated range of an array passed as part of the RPC call parameters.
Common Causes
- Invalid Parameter Values: The application may pass an array with incorrect dimensions or indices.
- Incorrect Object Type: The operation might be performed on a non-array object, leading to unexpected behavior.
- Exceeding Limits: The size of the array exceeds the maximum allowed by the RPC protocol.
Real-World Context
This error can occur in various scenarios where arrays are used as parameters in RPC calls. For example, when passing an array of data structures or when performing operations that require bounds checking on arrays.
Is This Error Critical?
The criticality of this error depends on the specific operation and context. In general, it is a serious issue because it can lead to memory corruption, crashes, or security vulnerabilities if not properly handled.
How to Diagnose
To diagnose RPC_S_INVALID_BOUND, follow these steps:
- Review Operation Context: Ensure that all RPC operations are performed within the correct context and with valid parameters.
- Validate Parameters: Check that arrays passed as parameters have the correct dimensions and indices.
- Confirm Object Types: Verify that the objects being operated on are indeed arrays and not other types of data structures.
How to Resolve
To resolve RPC_S_INVALID_BOUND, take these actions:
- Correct Parameter Usage: Ensure that all array-related parameters are correctly initialized and used within their valid bounds.
- Adjust Operation Context: If the operation context is incorrect, adjust it to ensure proper handling of arrays.
- Restore Data: If data corruption is suspected, restore the correct values for the affected arrays.
- Retry Operation with Valid Inputs: Re-run the RPC operation with validated and properly bounded array parameters.
Developer Notes
Developers should be cautious when working with arrays in RPC operations to avoid this error. Proper validation of array dimensions and indices is crucial to prevent memory-related issues.
Related Errors
RPC_S_INVALID_BINDING: Indicates an invalid binding context.RPC_S_CALL_FAILED: General failure during the RPC call execution.
FAQ
Q: What does RPC_S_INVALID_BOUND mean?
A: It indicates that array bounds are invalid in a Remote Procedure Call (RPC) operation.
Q: How can I prevent this error?
A: Ensure proper validation of array dimensions and indices before passing them as parameters in RPC calls.
Summary
The RPC_S_INVALID_BOUND error code is a specific indication that an array used in an RPC operation has invalid bounds. This error requires careful handling to avoid memory corruption or crashes. Developers should validate all array-related parameters and ensure proper context for the operation to prevent this issue.