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NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB
Where this result occurs in the Player workflow
NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB (0xC00D125F) marks calling cancellation after the job was already completed and acknowledged. For NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB, preserve that boundary even when the visible Player message is broader than the producing operation.
Mechanism
At the NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB 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 calling cancellation after the job was already completed and acknowledged.
For NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB, 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 shutdown cleanup tries to cancel a job whose final move already succeeded.
State snapshot
| Evidence | Why it matters for cancelcompletedjob |
|---|---|
| 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 | job state history, completion time, final file and Cancel caller |
| Generation identity | Record the same disc, device, job or Player operation generation that returned NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB; 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_CANCELCOMPLETEDJOB. |
| Controlled comparison | Repeat the producing call after changing only this condition: leave the completed file intact and stop issuing cancellation for that generation. |
How to interpret the next test
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with calling cancellation after the job was already completed and acknowledged; correct that state before changing unrelated codecs, drivers or playlists. |
A lower layer failed before NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB | Preserve that earlier HRESULT or device result because NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB may be only the Player-level mapping. |
| The same call passes after one isolated change | The comparison supports the cancelcompletedjob diagnosis rather than a broad installation failure. |
The code changes after retesting NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB | The NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB boundary was passed; diagnose the new HRESULT as the next independent stage. |
NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB scopes the failure to calling cancellation after the job was already completed and acknowledged. The presence of NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB does not establish a system-wide media failure; verify its owning operation before changing unrelated Player components.
Controlled diagnostic sequence
- Capture
0xC00D125F,NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB, the exact Player/API operation and the first timestamp at which it appears. - Save job state history, completion time, final file and Cancel caller; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- For
NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB, 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: leave the completed file intact and stop issuing cancellation for that generation.
- Create a fresh operation generation and verify that the original call advances beyond the cancelcompletedjob boundary.
Nearby codes with different owners
| Related result | Different diagnostic boundary |
|---|---|
NS_E_BKGDOWNLOAD_COMPLETECANCELLEDJOB | calling completion on a job that has already entered the canceled terminal state |
NS_E_BKGDOWNLOAD_NOJOBPOINTER | dereferencing a missing or released background-job interface |
NS_E_BKGDOWNLOAD_INVALIDJOBSIGNATURE | rejecting a background job not created or signed as a Player job |
Focused correction
For this occurrence, leave the completed file intact and stop issuing cancellation for that generation. Recreate only the object that produced NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB and repeat the original operation against the same controlled input.
When verifying NS_E_BKGDOWNLOAD_CANCELCOMPLETEDJOB, 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_CANCELCOMPLETEDJOB
- 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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