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NS_E_BKGDOWNLOAD_CALLFUNCFAILED
Where this result occurs in the Player workflow
NS_E_BKGDOWNLOAD_CALLFUNCFAILED (0xC00D1265) marks executing a requested plug-in function that returned a non-timeout failure. Keep this HRESULT attached to the producing operation even when the Player shows a broader message.
Mechanism
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.
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 the worker invokes the plug-in successfully but the function fails to allocate a resource.
State snapshot
| Evidence | Why it matters for callfuncfailed |
|---|---|
| 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 |
| Key observation | function identifier, arguments, thread/apartment, resource state and nested HRESULT |
| Controlled comparison | Repeat the producing call after changing only this condition: repair the specific callback dependency and retry through a new operation instance. |
Controlled diagnostic sequence
- Capture
0xC00D1265, the exact Player/API operation and the first timestamp at which it appears. - Save function identifier, arguments, thread/apartment, resource state and nested HRESULT; do this before ejecting media, reconnecting a device, canceling a job or rebuilding the Player object.
- 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: repair the specific callback dependency and retry through a new operation instance.
Nearby codes with different owners
| Related result | Different condition |
|---|---|
NS_E_BKGDOWNLOAD_CALLFUNCTIMEOUT | waiting longer than allowed for a download plug-in callback |
NS_E_BKGDOWNLOAD_PLUGIN_FAILEDTOMOVEFILE | moving a completed temporary file into its final Player destination |
NS_E_BKGDOWNLOAD_CALLFUNCENDED | aborting a callback because the Player/download service is terminating |
Focused correction
For this occurrence, repair the specific callback dependency and retry through a new operation instance. Recreate only the object that produced it and repeat the original operation against the same controlled input.
Discriminating evidence: Record the background-download callback name, job identifier and the HRESULT returned by the callback itself. The distinguishing fact is an invoked callback that failed; normal callback completion or cancellation of an already completed job should not be merged with this path.
Technical references
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