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CI_INVALID_PARTITION
CI_INVALID_PARTITION — 0xC0041802
This result belongs to invalid content-index partition not to a generic restart checklist, because the catalog references a partition identifier or partition structure that the indexing engine cannot use.
The contract behind the code
Catalog partitions, indexes, identifiers, merges, and on-disk versions are internal storage structures. In the context of invalid content-index partition, supported catalog administration and rebuild paths are safer than copying or editing individual files. Locate the first component changing state in this condition and distinguish later summary errors.
Important boundary. An invalid partition is not equivalent to an invalid query scope; it concerns the catalog’s storage organization. Record the exact constant and returning API.
Diagnostic worksheet
| Capture | Diagnostic question |
|---|---|
| Catalog/partition identifiers, on-disk path, service version, and administration action | Provides a stable before/after comparison for rebuilding or correcting the index path. |
| Partition metadata, filesystem placement, and move/restore history | Shows whether the first inconsistency arose during filtering, storage, administration, or enumeration. |
| Related catalog and index IDs | Ties the result to one catalog, source document, filter, or query object. |
| Known-good partition created by the same service build | Separates catalog state from source data, filter output, and client lifecycle. |
Preserve catalog IDs, filter versions, source hashes, property types, and timestamps; document contents and user data normally need not leave the host.
Useful comparisons
- Create a new catalog/partition through supported administration APIs. Record the first filter, catalog, merge, query, or enumeration result that changes.
- Compare path and metadata with a healthy partition. Keep source bytes, scope, filter version, and unrelated catalog settings fixed.
- Avoid copying partition files directly and test import/restore workflow instead. Use a copied catalog or a small disposable catalog when the test can rebuild derived state.
Retry only after one controlled catalog, filter, source, query, or merge condition changed; reopening the service may create a new catalog generation and hide the original evidence.
Read the result in context
When a minimal control succeeds, the failure is tied to the original object or its state rather than to the whole Windows subsystem. When the control fails identically, preserve host-level evidence first. If a different code appears, that is a moved boundary, not automatic success.
Preserve whether the result came from filtering, catalog storage, administration, or query enumeration; those paths can share a catalog name while requiring different corrective actions.
A defensible fix
Correction: Recreate or restore the partition using supported catalog management and reindex from source data. Keep the original catalog configuration, source inventory, filter identity, query definition, and event sequence so the change can be reversed and explained.
Accept the repair only when the partition opens, accepts updates, participates in merge, and remains valid after service restart. Repeat the original supported operation under the original identity and object state; a new catalog, different source scope, or replacement filter is useful comparison evidence but not final regression proof.
Technical references
Use these Microsoft references for the formal contract and combine them with the exact server or catalog evidence from the incident: Check version-specific behavior against the Windows and Indexing Service generation that produced the result.
- Microsoft: Indexing Service purpose and architecture — defines the formal status or component boundary.
- Microsoft: Indexing Service helper-function values — documents the relevant API or lifecycle.
- Microsoft: indexing and catalog management — provides the architecture, format, or protocol context.
- Microsoft: Indexing Service configuration entries — supports the controlled verification criteria.
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