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OLE_E_NOCONNECTION
OLE advisory connection identifier is unknown
OLE_E_NOCONNECTION is HRESULT 2147745796 (0x80040004) from winerror.h. AllStat describes it as “There is no connection for this connection ID” The result belongs to Unadvise or management of an existing OLE advise connection. The symbol this result is useful only when tied to the method and lifecycle phase where the supplied connection cookie does not identify an active advisory connection on this object.
The decisive meaning of this result is that the supplied connection cookie does not identify an active advisory connection on this object. The severity bit does not decide handling; the controlling fact is that the supplied connection cookie does not identify an active advisory connection on this object. A reliable it diagnosis preserves the raw value and reconstructs the state that made this true: the supplied connection cookie does not identify an active advisory connection on this object.
Where the result appears
- This result can surface in a compound-document containers, embedded or linked objects, OLE activation, advising, caching, conversion, and persistence.
- map the failure to one concrete operation among IOleObject, IOleLink, IOleCache, IAdviseSink, IPersistStorage, IOleInPlaceObject, monikers, verbs, and client-site callbacks.
- Preserve CLSID, object and client-site identity, storage or moniker, advise cookie, verb, activation state, window generation, and presentation format before releasing or replacing the object that returned this result.
An incident record for this HRESULT must distinguish caller, runtime, provider, and backing resource while testing whether the supplied connection cookie does not identify an active advisory connection on this object.
Typical causes and interpretation boundary
The immediate contract boundary is specific: the supplied connection cookie does not identify an active advisory connection on this object. Common cause branches include the following:
- The cookie belongs to another object.
- The connection was already removed.
- Object recreation invalidated the previous connection table.
Confirm the cause branch that explains why the supplied connection cookie does not identify an active advisory connection on this object by using call arguments, object state, metadata, device information, or provider traces.
Correct handling and recovery
The primary recovery is to track cookies per object generation and make disconnect cleanup idempotent without reusing stale identifiers. The result failure report should expose enough Unadvise or management of an existing OLE advise connection state to understand why the supplied connection cookie does not identify an active advisory connection on this object without a production debugger.
The owner of it must define idempotency, cancellation, attempt limits, and reconciliation for the failed Unadvise or management of an existing OLE advise connection. Reconcile persistent, remote, device, or ownership state before repeating it.
Practical scenario
A container reconnects an embedded object after reload but later calls Unadvise with the cookie from the previous instance. Record the decisive state for this HRESULT and verify recovery on a fresh object or request generation.
Difference from related HRESULTs
CONNECT_E_NOCONNECTION is the connection-point family equivalent; it belongs to OLE advise management Tests and telemetry should preserve that boundary for this HRESULT.
Developer and administrator guidance
Developers handling it should make object lifetime and state transitions explicit, preserve the native HRESULT, and keep cleanup paths safe when initialization or output is partial. Build a small container/server fixture that covers loaded, running, in-place active, UI-active, static, linked, and shutdown states.
Broad permission or compatibility changes are inappropriate unless evidence for the supplied connection cookie does not identify an active advisory connection on this object points to that layer. Repair for this HRESULT should target only the evidence-backed component, provider, document, device, or configuration.
References
- Microsoft: generic COM and OLE error codes
- Microsoft: IOleObject
- Microsoft: OLE and data-transfer interfaces
- Microsoft: OLE view caching
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