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CI_NO_CATALOG
CI_NO_CATALOG — 0xC0041806
This result belongs to missing Indexing Service catalog not to a generic restart checklist, because the requested catalog name or administration context does not resolve to an existing catalog.
Operational meaning
Indexing Service can be managed through MMC and the AdminIndexServer, CatAdm, and ScopeAdm automation objects. In the context of missing Indexing Service catalog, always record the target machine, catalog, object state, and configuration source before changing registry-backed settings. Locate the first component changing state in this condition and distinguish later summary errors.
Important boundary. A catalog can exist but be stopped or corrupt; the returned status means the catalog object itself was not found in the addressed context. Record the exact constant and returning API.
Facts worth preserving
| Record before retry | Use in verification |
|---|---|
| Catalog name, target machine, API/provider connection string, and caller identity | Separates catalog state from source data, filter output, and client lifecycle. |
| Enumerated catalogs and service running state | Provides a stable before/after comparison for rebuilding or correcting the index path. |
| Create/delete/rename history and remote administration target | Shows whether the first inconsistency arose during filtering, storage, administration, or enumeration. |
| Known-good catalog accessed through the same client path | Ties the result to one catalog, source document, filter, or query object. |
Preserve catalog IDs, filter versions, source hashes, property types, and timestamps; document contents and user data normally need not leave the host.
Reproduce the boundary safely
- Enumerate catalogs on the exact target machine before lookup. Use a copied catalog or a small disposable catalog when the test can rebuild derived state.
- Create a temporary catalog through AdminIndexServer and retrieve it by name. Retain a known-good document or query so a broad catalog rebuild is not mistaken for repair of the reported failure.
- Compare local and remote machine-name resolution. Record the first filter, catalog, merge, query, or enumeration result that changes.
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.
What not to infer
- Known-good comparison succeeds: isolate the production object or configuration associated with the failing operation.
- Same failure on the control: investigate the shared catalog, storage, filter-host, or query layer before changing source documents.
- Different status after one change: preserve both results; the first rejected condition was removed, but the operation is not yet proved complete.
Closing the incident
Correction: Correct the machine/catalog name or create/restore the intended catalog through supported administration tools. 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 catalog enumerates under the expected name and accepts both administration and query connections after 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
The following primary Microsoft documentation defines the status family and component boundaries used here: 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 Service administration and query objects — provides the architecture, format, or protocol context.
- Microsoft: indexing and managing catalogs — supports the controlled verification criteria.
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