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CI_E_OUTOFSEQ_INCREMENT_DATA
Incremental load data arrived out of sequence
CI_E_OUTOFSEQ_INCREMENT_DATA is HRESULT 0x8004181A. Windows documents it as “The incremental data given to Load is not valid. It may be out of sequence.”
Where the result belongs
This result belongs to applying ordered change data through a content-index Load operation. The next increment does not follow the catalog checkpoint or sequence expected by the loader.
Concrete causes
- Check a batch is replayed after acknowledgment loss.
- Check parallel workers reorder increments.
- Check a checkpoint is restored without its matching data stream.
- Check source and target generations diverge.
Compare the failing case with a control that preserves catalog generation and checkpoint and changes only batch sequence and predecessor; this prevents unrelated environment differences from dominating the test.
Evidence to retain
- Catalog generation and checkpoint
- Batch sequence and predecessor
- Producer/consumer timestamps
- Hash or identifier of each increment
Capture catalog generation and checkpoint before releasing objects, closing handles or reconnecting. Retain the raw HRESULT with batch sequence and predecessor, component version, UTC timestamp and correlation ID.
Diagnostic path
- Stop applying later increments.
- Compare the failing predecessor with the catalog checkpoint.
- Determine whether data is duplicate, missing or from another generation.
- Resume from a verified checkpoint or perform a controlled full reload.
Preserve the component version and target identity, then alter only the condition described as the next increment does not follow the catalog checkpoint or sequence expected by the loader.
Recovery and retry
Replay only the exact missing ordered data, or rebuild from a trusted baseline. Blindly accepting the batch can corrupt logical state. Record whether applying ordered change data through a content-index Load operation produced any content, update or state transition before returning.
Retry only after a concrete change in catalog generation and checkpoint or batch sequence and predecessor.
What must not be inferred
It does not mean the document-level change itself is invalid. Without the call boundary for applying ordered change data through a content-index Load operation, it also cannot identify which wrapper or configuration layer introduced the condition.
Nearby results
CI_E_DUPLICATE_NOTIFICATION concerns duplicate work-ID notifications; it protects the ordered incremental stream.
Developer and administrator actions
- Record catalog generation and checkpoint with the returned HRESULT.
- In telemetry, correlate batch sequence and predecessor with the target and component generation.
- For regression coverage, force the documented condition: the next increment does not follow the catalog checkpoint or sequence expected by the loader.
Operational example
Two queue partitions deliver batches 105 and 104 in reverse order. A single sequencer holds 105 until 104 commits.
Official Microsoft references
- Microsoft: content-indexing helper-function values — official contract information relevant to this HRESULT.
- Microsoft: Content-Indexing values
- Microsoft: HRESULT values
- Microsoft: Windows Search SQL syntax
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