What does Windows error code 355 (ERROR_DEVICE_HINT_NAME_BUFFER_TOO_SMALL) mean?

ERROR_DEVICE_HINT_NAME_BUFFER_TOO_SMALL

The device hint name buffer is too small to receive the remaining name.

ERROR_DEVICE_HINT_NAME_BUFFER_TOO_SMALL is Windows system result 355 (0x00000163). Microsoft defines it as “The device hint name buffer is too small to receive the remaining name.” The value should be captured immediately at the producing boundary because later diagnostics, cleanup, or retry code can overwrite a thread-local last-error value or collapse a richer native status.

How to classify the result

This result represents a buffer-sizing continuation condition during device hint enumeration. The correct interpretation depends on the device-discovery API that owns the hint-name buffer, including its character-count units and continuation semantics.

The most important boundary for it is whether the operation reached a documented final state.

Where it can appear

• This result can appear in device enumeration that returns human-readable or firmware-provided hint names.
• This result can appear in a driver or management service that copies a variable-length device label.
• It can appear in a compatibility layer translating a native buffer-length status to Win32.

Typical causes

• the caller supplied a fixed buffer smaller than the remaining name.
• the required size was interpreted as bytes instead of characters.
• the name changed between the sizing and retrieval calls.
• the caller failed to preserve the enumeration cursor after resizing.
• a terminator or structure header was not included in the allocation calculation.

These causes are starting points for it, not substitutes for evidence.

Evidence to preserve

• Record device instance or enumeration identity for it.
• Record input buffer length and returned required length for it.
• Record encoding and element width for it.
• Record enumeration index or resume token for it.
• Record whether the device list changed between calls for it.

Also retain decimal 355, hexadecimal 0x00000163, UTC time, machine build, component version, and a correlation identifier.

Recovery and retry

The recovery objective for it is to Resize the caller-owned buffer according to the producing API, preserve the enumeration position, and retrieve the same remaining name again.

A resize-and-retry loop is appropriate when it is bounded and the required length progresses. Stop on repeated growth, overflow, or an unchanged impossible requirement.

Difference from related results

ERROR_INSUFFICIENT_BUFFER is a broad sizing result. It specifically identifies the remaining device hint name and may be part of an enumeration protocol.

Keep the original constant in telemetry rather than replacing it with a nearby result that seems more familiar.

Practical validation scenario

A diagnostic tool requests a device hint into 128 WCHARs and receives a requirement of 214. It allocates 215 WCHARs only after confirming whether the returned count includes the terminator, retries the same item, and logs both lengths.

A useful test report for it includes the failing call, exact input, state before the call, raw output, expected state, and observed state after recovery.

Telemetry and support fields

• Record device_hint_name_buffer_too_small_operation for the producing API, callback, wait, driver, packaging phase, or service transition.
• Record device_hint_name_buffer_too_small_target for the stable session, selector, device, pin, content, resource, service, or validation identity.
• Record device_hint_name_buffer_too_small_state_before and device_hint_name_buffer_too_small_requested_state using explicit units and enum names.
• Record device_hint_name_buffer_too_small_raw_status, the original result domain, and any later HRESULT or Win32 conversion.
• Record device_hint_name_buffer_too_small_attempt, elapsed time, process and thread IDs, server or device instance, and correlation ID.

Alerting for it should reflect the classification above.

Developer and administrator guidance

Driver-facing code should use size_t-safe calculations and retain the first status. Administrators should update the responsible device stack only after proving the result is not simply a caller buffer defect.

Developers should preserve it at module boundaries and document whether ownership of buffers, handles, mutexes, callbacks, or transition contexts changes on return.

References

• Microsoft: System Error Codes 0–499
• Microsoft: Device identification strings
• Microsoft: FormatMessage

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