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E_FDPAIRING_IPBUSDISABLED
The scope of E_FDPAIRING_IPBUSDISABLED is Function Discovery and PnP-X device pairing: the PnP-X IP Bus Enumerator component required for network-device association is disabled. Preserve 0x8FD00007 beside the returning call before cleanup or retry creates a more generic secondary failure.
Read the boundary first
When it is returned, Function Discovery separates discovery from association and installation. During a this result investigation, a device can be visible yet reject a connection, complete discovery but fail authentication, lack a usable profile, or depend on a disabled PnP-X bus component. Pairing evidence must therefore distinguish host policy, provider state, network reachability, device capacity and user-confirmation outcomes.
During a this result investigation, PnP-X uses discovery providers and the IP bus enumerator to represent associated network devices in Plug and Play. Discovery results alone cannot create the expected device node when that bus component is unavailable.
The first owner to inspect is the discovery provider, pairing handler, association database, network protocol, device ceremony, or PnP-X bus component that returned the HRESULT.
Keep neighboring conditions separate
When it is returned, NOPROFILES means Windows lacks a usable device profile; IPBUSDISABLED means the bus infrastructure is unavailable.
Do not edit DCOM permissions or service registry ownership without evidence of a permission failure.
Incident record for this HRESULT
| Capture | Diagnostic value |
|---|---|
| IPBusEnum service/component state for it. | This provides a stable comparison across retries or another machine and helps test the Function Discovery and PnP-X device pairing boundary. |
| PnP-X function instance for it. | This identifies the exact object or resource generation involved and helps test the Function Discovery and PnP-X device pairing boundary. |
| Association database entry for it. | This places the failure on the lifecycle or transaction timeline and helps test the Function Discovery and PnP-X device pairing boundary. |
| Device node creation events for it. | This separates caller input from environment and service state and helps test the Function Discovery and PnP-X device pairing boundary. |
Reproduce without destroying evidence
The investigation should change one variable at a time and keep the original failing sample.
- First: Confirm the feature applies to this legacy PnP-X path.
- Next: Restore the component through supported service or feature configuration.
- Then: Repeat association and observe devnode creation.
- Finally: Check dependent discovery providers.
Three useful controls
- Controlled host or network for the same device: for it, a changed result separates retained object, connection, path, host, or device state from the original input. Hold constant: for it, keep firmware, pairing ceremony, and device state fixed.
- Reduced failing operation: If this result follows the reduced step, the rejecting transition is localized. Hold constant: for it, retain ipbusenum service/component state and remove only unrelated work.
- Targeted corrective control: Use this as a diagnostic branch rather than a blanket workaround: confirm the feature applies to this legacy PnP-X path. Hold constant: for it, keep the original this result sample available for the final regression test.
Definition of done
Closure for it requires association produces the expected PnP device node and remains present while the device is online; then repeat the next lifecycle operation to detect stale state.
Technical references
The references below define the API family or storage/protocol behavior used to interpret this result.
- Microsoft Win32 metadata: winerror.h
- Microsoft: PnP-X architecture
- Microsoft: IFunctionDiscoveryProvider
- Microsoft: IPNPXDeviceAssociation
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