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hrInvalidBufferSize
The object and state that matter
hrInvalidBufferSize means the supplied byte count is incompatible with the selected column type or operation.
This is the legacy Directory Service backup/restore HRESULT form of JET_errInvalidBufferSize (0xC8000417).
The key comparison is: hrBufferTooSmall requests more output capacity; this result flags an invalid fixed-size input or contract. The first useful observation is to capture JET_COLUMNDEF, column type, code page, cbData, grbits, and the exact buffer representation. This evidence separates malformed input from a valid name, path, or buffer that simply produced no result.
Minimum useful trace
- Code-specific observation: capture JET_COLUMNDEF, column type, code page, cbData, grbits, and the exact buffer representation.
- structure sizes, reserved fields, grbits, and API version; associate it with this result rather than with a later generic exception.
- the documented required-size value for any output buffer; associate it with this result rather than with a later generic exception.
- the unmodified argument value with its Unicode and byte lengths.
How to avoid a false diagnosis
hrBufferTooSmall | a caller-provided output area cannot hold the value ESE is returning |
|---|---|
hrInvalidFilename | the filename component fails ESE rules even if the parent path exists |
hrInvalidPath | a database, system, log, or temporary directory does not satisfy the path contract |
The ESE objects in play
| Diagnostic layer | API argument, naming, path, and buffer contracts |
|---|---|
| Typical API surface | the specific Jet* function named by the caller and its structure definitions in esent.h |
| Code-specific condition | the supplied byte count is incompatible with the selected column type or operation |
| First corrective direction | serialize the value according to the declared column type and pass its exact byte width |
ESE distinguishes malformed input from a valid lookup that finds nothing. Many output APIs expose a required byte count, while fixed-width inputs must match a declared type exactly.
Safe recovery sequence
- Freeze the failing request context and record
0xC8000417, the Jet API name, and the current instance/session ownership. - Verify the code-specific precondition: capture JET_COLUMNDEF, column type, code page, cbData, grbits, and the exact buffer representation.
- Apply the targeted fix: serialize the value according to the declared column type and pass its exact byte width.
- Before retrying the operation, reconcile the exact argument bytes and the absence of unintended object creation.
Actions that can hide or worsen the problem
- Do not silently trim, recode, or sanitize the value into a different identifier.
- Do not grow a fixed-width input buffer as though it were a variable output.
Technical references
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