What does HRESULT 0x00040EC8 (DB_S_BUFFERFULL) mean?

DB_S_BUFFERFULL

OLE DB completed but could not allocate a full status or string buffer

DB_S_BUFFERFULL is HRESULT 265928 (0x00040EC8) from Microsoft OLE DB. AllStat describes DB_S_BUFFERFULL as “Operation succeeded, but status array or string buffer could not be allocated.” The high-order severity bit is clear, so this is a success result, but it carries more information than plain S_OK.

The primary operation succeeded, but the provider could not allocate all auxiliary status-array or string-buffer output.

Where this result is encountered

• DB_S_BUFFERFULL can appear in schema or property retrieval; record the producing interface and method rather than inferring behavior from the symbolic name alone.
• DB_S_BUFFERFULL can appear in diagnostic text collection; record the producing interface and method rather than inferring behavior from the symbolic name alone.
• DB_S_BUFFERFULL can appear in operations returning a primary result plus optional detail buffers; record the producing interface and method rather than inferring behavior from the symbolic name alone.

For DB_S_BUFFERFULL, the same numeric success value can be mishandled when a wrapper exposes only a Boolean. For DB_S_BUFFERFULL, keep the original HRESULT until the code-specific outputs and state transition have been evaluated.

State boundary that must be proved

The central question for DB_S_BUFFERFULL is whether the caller knows which auxiliary outputs are missing and does not present incomplete diagnostics as exhaustive. For DB_S_BUFFERFULL, the HRESULT alone confirms neither unrelated work nor the quality of optional outputs.

A reliable interpretation of DB_S_BUFFERFULL names the exact method contract, the object generation, and the outputs that remain valid. For DB_S_BUFFERFULL, this prevents a success-with-information result from being promoted to full success or demoted to a generic error.

Evidence and telemetry to preserve

• For DB_S_BUFFERFULL, preserve requested buffer sizes.
• For DB_S_BUFFERFULL, preserve returned counts and null pointers.
• For DB_S_BUFFERFULL, preserve allocator used by provider.
• For DB_S_BUFFERFULL, preserve primary operation result.
• For DB_S_BUFFERFULL, preserve memory pressure at the time of the call.

Also record db_s_bufferfull_operation, db_s_bufferfull_object, db_s_bufferfull_state_before, db_s_bufferfull_state_after, UTC time, process and thread identifiers, and a correlation ID. For DB_S_BUFFERFULL, keep secrets out of logs while retaining GUIDs, CLSIDs, media subtypes, property IDs, row identities, and hashes needed to distinguish objects.

Correct handling, retry, and recovery

Keep the primary successful result when valid, then retry only the detail retrieval with appropriate sizing or after reducing memory pressure.

Retry DB_S_BUFFERFULL only when the recorded state can change the documented outcome. For DB_S_BUFFERFULL, repeating the same call is inappropriate for a stable end marker, cancellation, unsupported format, adjusted property, or partial result whose completed side effects have not been reconciled.

Diagnostic sequence

• For DB_S_BUFFERFULL, capture the raw HRESULT 0x00040EC8 immediately after the returning method and record whether the caller used SUCCEEDED, FAILED, equality testing, or exception translation.
• Identify the exact owner of DB_S_BUFFERFULL: interface, method, object instance, provider or filter version, thread or apartment, and operation phase.
• Validate the decisive contract boundary for DB_S_BUFFERFULL: the caller knows which auxiliary outputs are missing and does not present incomplete diagnostics as exhaustive.
• For DB_S_BUFFERFULL, inspect every output parameter, count, status array, returned interface, or side effect that the method documentation associates with this success-with-information result.
• Compare the observed state before and after DB_S_BUFFERFULL; do not assume that a success severity bit means every optional sub-operation completed.
• For DB_S_BUFFERFULL, reproduce the smallest request with the same object state and then change only the condition identified by the evidence before repeating the operation.

Practical validation scenario

A schema query succeeds but cannot return every descriptive string during memory pressure. The tool retains identifiers, retries descriptions in smaller batches, and marks omitted text explicitly.

The negative test should preserve the condition that produces DB_S_BUFFERFULL; the recovery test should alter only that condition and verify the final state as well as the HRESULT.

Difference from nearby HRESULT values

DB_S_ERRORSRETURNED means an error array contains details; DB_S_BUFFERFULL means the provider could not allocate the full auxiliary buffer.

For DB_S_BUFFERFULL, this distinction determines whether the caller should consume partial outputs, stop iteration, wait, reconfigure, notify the user, or perform no error recovery at all.

Developer and administrator guidance

For DB_S_BUFFERFULL, application telemetry should separate terminal failure, ordinary success, partial completion, continuation, cancellation, and warning-like success. For DB_S_BUFFERFULL, support bundles should contain the smallest reproducible call and the effective configuration seen by the owning component.

A support report for DB_S_BUFFERFULL should include decimal 265928, hexadecimal 0x00040EC8, the AllStat meaning, the owning API, and the first detailed status or output that explains why the method did not return ordinary S_OK.

References

• Microsoft: OLE DB return codes — official documentation relevant to DB_S_BUFFERFULL.
• Microsoft: OLE DB Driver return codes — official documentation relevant to DB_S_BUFFERFULL.
• Microsoft: OLE DB error records — official documentation relevant to DB_S_BUFFERFULL.

Looking for a different code? Search another status or error code.