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NS_E_DEVICE_DISCONNECTED
Where this result occurs in the Player workflow
NS_E_DEVICE_DISCONNECTED (0xC00D0FA2) marks using a portable-device object after its physical connection was removed. For NS_E_DEVICE_DISCONNECTED, preserve that boundary even when the visible Player message is broader than the producing operation.
Mechanism
At the NS_E_DEVICE_DISCONNECTED checkpoint, windows Media Device Manager brokers between the Player, a device service provider and MTP, mass-storage or legacy device transports; Enumeration, Plug and Play identity, storage availability, format support and individual file operations are distinct checks. The page-specific boundary is using a portable-device object after its physical connection was removed.
For NS_E_DEVICE_DISCONNECTED, a device shown in Explorer can still disappear from the Player’s WMDM session or reject a media format, filename, directory operation or storage request. A representative way to reach this result is that the cable is removed while a queued sync item still holds the old interface.
State snapshot
| Evidence | Why it matters for device disconnected |
|---|---|
| Producing object and operation | PnP instance and interface path, WMDM service-provider CLSID, device/partnership ID, connection generation, storage object and capacity, format-support result, firmware version, operation callback and first device or transport HRESULT |
| Decisive observation | PnP removal event, device instance ID, connection generation and outstanding operation |
| Generation identity | Record the same disc, device, job or Player operation generation that returned NS_E_DEVICE_DISCONNECTED; a reconnect or media change creates a different test. |
| Underlying result | Keep the first device, filesystem, COM, codec, DirectShow, IMAPI or BITS result seen before the Player mapped it to NS_E_DEVICE_DISCONNECTED. |
| Controlled comparison | Repeat the producing call after changing only this condition: reconnect and re-enumerate the device before resuming with a new object. |
How to interpret the next test
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with using a portable-device object after its physical connection was removed; correct that state before changing unrelated codecs, drivers or playlists. |
A lower layer failed before NS_E_DEVICE_DISCONNECTED | Preserve that earlier HRESULT or device result because NS_E_DEVICE_DISCONNECTED may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the device disconnected diagnosis rather than a broad installation failure. |
The code changes after retesting NS_E_DEVICE_DISCONNECTED | The NS_E_DEVICE_DISCONNECTED boundary was passed; diagnose the new HRESULT as the next independent stage. |
NS_E_DEVICE_DISCONNECTED scopes the failure to using a portable-device object after its physical connection was removed. The presence of NS_E_DEVICE_DISCONNECTED does not establish a system-wide media failure; verify its owning operation before changing unrelated Player components.
Controlled diagnostic sequence
- Capture
0xC00D0FA2,NS_E_DEVICE_DISCONNECTED, the exact Player/API operation and the first timestamp at which it appears. - Save PnP removal event, device instance ID, connection generation and outstanding operation; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- For
NS_E_DEVICE_DISCONNECTED, correlate the result with PnP instance and interface path, WMDM service-provider CLSID, device/partnership ID, connection generation, storage object and capacity, format-support result, firmware version, operation callback and first device or transport HRESULT. - Reproduce once with the original source and destination, then apply only this change: reconnect and re-enumerate the device before resuming with a new object.
- Create a fresh operation generation and verify that the original call advances beyond the device disconnected boundary.
Nearby codes with different owners
| Related result | Different diagnostic boundary |
|---|---|
NS_E_DEVICE_NOT_SUPPORT_FORMAT | checking whether the device advertises support for the item’s media format |
NS_E_DEVICE_IS_NOT_READY | opening device storage before the service provider reports a ready state |
NS_E_PDA_UNSUPPORTED_FORMAT | validating a portable-device operation against the object’s format |
Focused correction
For this occurrence, reconnect and re-enumerate the device before resuming with a new object. Recreate only the object that produced NS_E_DEVICE_DISCONNECTED and repeat the original operation against the same controlled input.
When verifying NS_E_DEVICE_DISCONNECTED, do not assume the old interface pointer remains valid after reconnect; Re-enumerate the device and storage objects and correlate the failure with the same connection generation.
Technical references for NS_E_DEVICE_DISCONNECTED
- Windows Media Device Manager SDK.
- Enabling Plug and Play for WMDM devices.
- Portable-device capabilities and shell requirements.
- WMDM connection and storage notifications.
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