What does HRESULT 0x80041739 (FILTER_E_NOT_OPEN) mean?

FILTER_E_NOT_OPEN

No document is open in the filter instance

FILTER_E_NOT_OPEN is HRESULT 0x80041739 (-2147215559 signed; 2147751737 unsigned). Its severity bit is 1, facility is 4 (FACILITY_ITF for these values), and code field is 0x1739. For FILTER_E_NOT_OPEN, standard HRESULT severity rules classify the value as a failure. AllStat describes the value as “The document is not opened.”

Interpretation in context

FILTER_E_NOT_OPEN belongs to requesting extraction or close behavior before the handler has successfully opened a source. The decisive interpretation is that the caller and filter disagree about lifecycle state. For FILTER_E_NOT_OPEN, keep the symbolic constant and method stage together in logs; its hexadecimal value alone cannot identify the owning transition or input.

For FILTER_E_NOT_OPEN, the IFilter contract is stateful: GetChunk selects a chunk, then GetText or GetValue consumes content according to STAT_CHUNK flags. In the FILTER_E_NOT_OPEN investigation, method order and filter-instance ownership are therefore part of the evidence. This context narrows the responsible component without replacing the code-specific checks below.

Conditions to test

• FILTER_E_NOT_OPEN: Initialization failed but later methods still execute.
• FILTER_E_NOT_OPEN: Cleanup runs twice.
• FILTER_E_NOT_OPEN: An instance was returned to a pool after close.
• FILTER_E_NOT_OPEN: One thread closes state another thread expects to use.

The useful hypothesis for FILTER_E_NOT_OPEN must explain both requesting extraction or close behavior before the handler has successfully opened a source and the documented condition. Compare the failing case with a control that preserves instance identity and lifecycle transitions and changes only result of the preceding open/init call; this prevents unrelated environment differences from dominating the FILTER_E_NOT_OPEN test.

Incident record

• For FILTER_E_NOT_OPEN, check instance identity and lifecycle transitions.
• For FILTER_E_NOT_OPEN, check result of the preceding open/init call.
• For FILTER_E_NOT_OPEN, check method invoked after state loss.
• For FILTER_E_NOT_OPEN, check thread and cancellation ownership.

For FILTER_E_NOT_OPEN, capture instance identity and lifecycle transitions before releasing objects, closing handles or reconnecting. Retain the raw HRESULT with result of the preceding open/init call, component version, UTC timestamp and correlation ID. Bound the FILTER_E_NOT_OPEN telemetry to diagnostic metadata because document content, credentials and unrestricted query text may be sensitive.

Step-by-step diagnosis

1. Find the last successful state transition for this instance. Associate this observation specifically with FILTER_E_NOT_OPEN.
2. Stop the pipeline immediately after a failed open. Associate this observation specifically with FILTER_E_NOT_OPEN.
3. Make close idempotent at the wrapper layer. Associate this observation specifically with FILTER_E_NOT_OPEN.
4. Prove that each task owns an independent filter object. Associate this observation specifically with FILTER_E_NOT_OPEN.

Change one variable per FILTER_E_NOT_OPEN control run. Preserve the component version and target identity, then alter only the condition described as the caller and filter disagree about lifecycle state. This isolates whether FILTER_E_NOT_OPEN is causal rather than merely repeatable.

Retry decision

Open and initialize a source successfully before extraction, or replace the invalid instance. Repeating the out-of-order method is not a retry. For FILTER_E_NOT_OPEN, record whether requesting extraction or close behavior before the handler has successfully opened a source produced any content, update or state transition before returning. If completion remains unknown, the FILTER_E_NOT_OPEN path must not replay non-idempotent work until the owner confirms final state.

The retry gate for FILTER_E_NOT_OPEN should be a concrete change in instance identity and lifecycle transitions or result of the preceding open/init call. A timer alone cannot demonstrate that the FILTER_E_NOT_OPEN contract condition has changed.

What the value cannot establish

It does not mean the source path is missing or inaccessible; the call may never have reached the source. Without the call boundary for requesting extraction or close behavior before the handler has successfully opened a source, FILTER_E_NOT_OPEN also cannot identify which wrapper or configuration layer introduced the condition.

Adjacent contract states

FILTER_E_ALREADY_OPEN detects a second open; FILTER_E_NOT_OPEN detects use with no active object. In FILTER_E_NOT_OPEN telemetry, preserve neighboring constants separately because the same visible symptom may require a different caller action, owner or recovery gate.

Developer and administrator actions

• At the code boundary, keep instance identity and lifecycle transitions beside the returned HRESULT; preserve the observation under the FILTER_E_NOT_OPEN correlation record.
• In telemetry, correlate result of the preceding open/init call with the target and component generation; preserve the observation under the FILTER_E_NOT_OPEN correlation record.
• For regression coverage, force the documented condition: the caller and filter disagree about lifecycle state; preserve the observation under the FILTER_E_NOT_OPEN correlation record.
• For operations staff, expose the corrective state change rather than a generic retry button; preserve the observation under the FILTER_E_NOT_OPEN correlation record.
• After remediation, validate one known-good control and the original failing case; preserve the observation under the FILTER_E_NOT_OPEN correlation record.

Concrete scenario

An error handler closes a filter and the normal completion path closes it again. State-machine assertions identify the double cleanup. In this scenario, handling FILTER_E_NOT_OPEN at its real contract boundary prevents the application from collapsing a precise state into an unhelpful generic “search failed” message.

Official Microsoft references

• Microsoft: Content-Indexing values — official contract information relevant to FILTER_E_NOT_OPEN.
• Microsoft: IFilter interface — official contract information relevant to FILTER_E_NOT_OPEN.
• Microsoft: testing filter handlers — official contract information relevant to FILTER_E_NOT_OPEN.
• Microsoft: filter handlers in Windows Search — official contract information relevant to FILTER_E_NOT_OPEN.
• Microsoft: Filter-Interface values — official contract information relevant to FILTER_E_NOT_OPEN.

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