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DB_E_OBJECTOPEN
Exact value and interpretation
DB_E_OBJECTOPEN has the unsigned 32-bit value 2147749381 (0x80040E05) and the signed representation -2147217915. AllStat defines the result as “Object was open”. In the concrete failure represented here, an OLE DB operation requires an object to be closed but a dependent rowset, command result or storage object is still open.
The high bit is set for it, so it is a failure HRESULT rather than a success or informational status. Its facility field is 4 (FACILITY_ITF) and its low code is 3589 (0x0E05). Those bit fields place this result in an interface-defined family, but they do not reveal the provider, object identity, method, rowset generation or command state that produced it.
OLE DB contract boundary
This result must be interpreted against this contract: OLE DB objects follow both COM lifetime rules and provider-specific state contracts; open dependents, ownership transfer, aggregation, callbacks and namespace identity must be traced from the exact interface call rather than inferred from a wrapper exception.
Start with the COM object that returned the result and every dependent interface or provider-owned resource involved in the call when investigating this result. Preserve it before ADO, ATL,.NET, a database abstraction layer or an application exception replaces it with a generic message; the exact interface and method matter because one OLE DB object can expose several contracts with different preconditions.
Specific conditions that produce the result
- Cause 1 for it: an active rowset still references the command being changed or unprepared.
- Cause 2 for it: a table, index or stream is open while a definition operation targets it.
- Cause 3 for it: the consumer leaked an interface or row handle that keeps the provider object active.
Evidence to collect before changing the system
A useful it record includes provider CLSID and version, process architecture, interface and method, COM apartment and thread, object correlation ID, transaction state, and the first preceding HRESULT. When it involves object URLs, command trees, data source names, caller identities and copied data, record types, lengths, hashes or redacted identifiers instead of secrets or full business data.
- Evidence 1 for it: the exact object and operation blocked by the open dependency.
- Evidence 2 for it: outstanding interface counts, rowsets, rows, chapters and storage objects.
- Evidence 3 for it: the creation stack or correlation ID for every dependent object not yet released.
Diagnostic sequence
- Capture it immediately at the native OLE DB return and obtain the current OLE DB error object before another COM call replaces thread error information.
- Identify the exact stage for it: an OLE DB operation requires an object to be closed but a dependent rowset, command result or storage object is still open.
- compare the live command, rowset, accessor or schema state with the metadata and properties actually granted by the provider.
- inspect per-binding, per-property, per-row or per-record statuses whenever the method supplies them; the aggregate result may not identify the rejected element.
- reproduce the issue with the smallest command, rowset or definition operation that preserves the same contract boundary.
- apply one evidence-backed correction, then verify that the operation succeeds and does not merely change into a nearby HRESULT.
Corrective actions
- Action 1 for it: close result rowsets and release row, chapter and stream handles in reverse ownership order.
- Action 2 for it: separate metadata changes from active query lifetimes.
- Action 3 for it: add deterministic cleanup around every early-return and cancellation path.
Retry and recovery policy
Retry rule for it: retry after all documented dependent objects are closed; waiting alone is insufficient if a reference leak keeps them open. A safe it retry must use a changed input, object generation, provider capability or state transition. If the call returning it could have created, updated, deleted or copied data, determine partial completion before replaying it.
Use bounded retries and preserve cancellation. Configuration and contract failures should normally fail fast; concurrency, resource or transient state failures may justify retry only after their stated precondition changes.
Practical incident
A service calls ICommandPrepare::Unprepare while a rowset produced by that command is still alive; releasing the rowset first removes it. The diagnostic value comes from retaining it together with the failing interface and object state, not from reducing every provider result to “database error”.
Difference from related HRESULT values
DB_E_TABLEINUSE and DB_E_INDEXINUSE name specific schema objects in use, while it is the general object-state failure. Keep these outcomes separate in telemetry and user-facing remediation because it requires a different next action.
Implementation guidance
Code handling it should release OLE DB resources in ownership order, preserve every provider error record, and log granted properties rather than only requested properties. When handling it, handles such as HACCESSOR, HROW, HCHAPTER and provider-specific region tokens must never be treated as portable integers across object lifetimes.
When it crosses an abstraction boundary, attach a stable correlation ID and structured fields for the native HRESULT, provider source, interface IID, method, object generation and operation phase. Do not log passwords, access tokens, complete SQL text or unrestricted row values merely to make the event easier to search.
Official Microsoft references
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