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NS_E_BKGDOWNLOAD_CALLFUNCENDED
Where this result occurs in the Player workflow
NS_E_BKGDOWNLOAD_CALLFUNCENDED (0xC00D1267) marks aborting a callback because the Player/download service is terminating. For NS_E_BKGDOWNLOAD_CALLFUNCENDED, preserve that boundary even when the visible Player message is broader than the producing operation.
Mechanism
At the NS_E_BKGDOWNLOAD_CALLFUNCENDED checkpoint, the Player’s download manager coordinates an owner window, a plug-in, background job identity, temporary files and final completion or cancellation; A downloaded .wmd package adds an extraction and cataloguing phase after transfer. The page-specific boundary is aborting a callback because the Player/download service is terminating.
For NS_E_BKGDOWNLOAD_CALLFUNCENDED, receiving all network bytes is not the same as completing the job, moving the temporary file or successfully unpacking and cataloguing a Windows Media Download package. A representative way to reach this result is that a long callback is interrupted when the Player closes.
State snapshot
| Evidence | Why it matters for callfuncended |
|---|---|
| Producing object and operation | job GUID and Player signature, BITS/job state, expected and actual file count, remote and local names, temporary path, completion/cancel request, plug-in and callback identity, COM apartment, WMD extraction result and first underlying HRESULT |
| Decisive observation | shutdown generation, active function, job state and recovery marker |
| Generation identity | Record the same disc, device, job or Player operation generation that returned NS_E_BKGDOWNLOAD_CALLFUNCENDED; 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_BKGDOWNLOAD_CALLFUNCENDED. |
| Controlled comparison | Repeat the producing call after changing only this condition: allow shutdown cleanup and resume/recreate the job after the Player restarts. |
How to interpret the next test
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with aborting a callback because the Player/download service is terminating; correct that state before changing unrelated codecs, drivers or playlists. |
A lower layer failed before NS_E_BKGDOWNLOAD_CALLFUNCENDED | Preserve that earlier HRESULT or device result because NS_E_BKGDOWNLOAD_CALLFUNCENDED may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the callfuncended diagnosis rather than a broad installation failure. |
The code changes after retesting NS_E_BKGDOWNLOAD_CALLFUNCENDED | The NS_E_BKGDOWNLOAD_CALLFUNCENDED boundary was passed; diagnose the new HRESULT as the next independent stage. |
NS_E_BKGDOWNLOAD_CALLFUNCENDED scopes the failure to aborting a callback because the Player/download service is terminating. The presence of NS_E_BKGDOWNLOAD_CALLFUNCENDED does not establish a system-wide media failure; verify its owning operation before changing unrelated Player components.
Controlled diagnostic sequence
- Capture
0xC00D1267,NS_E_BKGDOWNLOAD_CALLFUNCENDED, the exact Player/API operation and the first timestamp at which it appears. - Save shutdown generation, active function, job state and recovery marker; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- For
NS_E_BKGDOWNLOAD_CALLFUNCENDED, correlate the result with job GUID and Player signature, BITS/job state, expected and actual file count, remote and local names, temporary path, completion/cancel request, plug-in and callback identity, COM apartment, WMD extraction result and first underlying HRESULT. - Reproduce once with the original source and destination, then apply only this change: allow shutdown cleanup and resume/recreate the job after the Player restarts.
- Create a fresh operation generation and verify that the original call advances beyond the callfuncended boundary.
Nearby codes with different owners
| Related result | Different diagnostic boundary |
|---|---|
NS_E_BKGDOWNLOAD_CALLFUNCTIMEOUT | waiting longer than allowed for a download plug-in callback |
NS_E_BKGDOWNLOAD_WMDUNPACKFAILED | extracting and validating a downloaded .wmd package after transfer |
NS_E_BKGDOWNLOAD_CALLFUNCFAILED | executing a requested plug-in function that returned a non-timeout failure |
Focused correction
For this occurrence, allow shutdown cleanup and resume/recreate the job after the Player restarts. Recreate only the object that produced NS_E_BKGDOWNLOAD_CALLFUNCENDED and repeat the original operation against the same controlled input.
When verifying NS_E_BKGDOWNLOAD_CALLFUNCENDED, do not delete the job or temporary file before recording its state, owner signature and file list; Completion and cancellation are terminal operations and must not be retried blindly.
Technical references for NS_E_BKGDOWNLOAD_CALLFUNCENDED
- BITS interfaces and job objects.
- Completing and canceling a BITS job.
- BITS return values and job-state failures.
- Windows Media Download packages.
- Creating the COM Global Interface Table.
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