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NS_E_USER_STOP
Practical scope of NS_E_USER_STOP
This HRESULT is produced at terminating the current Player operation in response to explicit user cancellation. This result belongs to user cancellation and operation ownership, not to an undifferentiated “Windows Media problem.”
Pipeline position
At the checkpoint, long-running ripping, burning, synchronization and transfer operations expose cancellation through the Player UI and event model; A cancellation result records control flow, not media corruption. The page-specific boundary is terminating the current Player operation in response to explicit user cancellation.
A canceled operation can leave a valid source, device and configuration; it only proves that the current generation was deliberately stopped. In a typical failing run, the user presses Stop during ripping or synchronization.
Reproduction record
| Evidence | Why it matters for user stop |
|---|---|
| Producing object and operation | operation type and generation, initiating command, cancel source, state before cancellation, active item, progress value, callback order and cleanup result |
| Decisive observation | operation generation, user command, active item, progress and cleanup callbacks |
| Generation identity | Record the same disc, device, job or Player operation generation that returned this result; 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 this result. |
| Controlled comparison | Repeat the producing call after changing only this condition: treat the generation as canceled, complete cleanup and wait for a new start request. |
Reading the evidence
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with terminating the current Player operation in response to explicit user cancellation; correct that state before changing unrelated codecs, drivers or playlists. |
| A lower layer failed before this result | Preserve that earlier HRESULT or device result because it may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the user stop diagnosis rather than a broad installation failure. |
| The code changes after retesting it | The boundary was passed; diagnose the new HRESULT as the next independent stage. |
It scopes the failure to terminating the current Player operation in response to explicit user cancellation.
Verification procedure
- Capture
0xC00D0FA9, it, the exact Player/API operation and the first timestamp at which it appears. - Save operation generation, user command, active item, progress and cleanup callbacks; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- correlate the result with operation type and generation, initiating command, cancel source, state before cancellation, active item, progress value, callback order and cleanup result.
- Reproduce once with the original source and destination, then apply only this change: treat the generation as canceled, complete cleanup and wait for a new start request.
- Create a fresh operation generation and verify that the original call advances beyond the user stop boundary.
Results that may look similar
| Related result | Different diagnostic boundary |
|---|
Change the smallest responsible condition
The targeted action is to treat the generation as canceled, complete cleanup and wait for a new start request. While retesting it, keep unrelated media, device, playlist and network values unchanged.
When verifying it, do not convert an expected user cancellation into an automatic repair workflow; Finish cleanup and let a new user action create a new operation generation.
References
- About CD Ripping.
- About CD Burning.
- About Device Synchronization.
- Completing and canceling a BITS job.
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