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NS_E_BKGDOWNLOAD_FAILED_TO_CREATE_TEMPFILE
Practical scope of NS_E_BKGDOWNLOAD_FAILED_TO_CREATE_TEMPFILE
This HRESULT is produced at allocating the temporary local file used before job completion. This result belongs to background download jobs and windows media packages, not to an undifferentiated “Windows Media problem.”
Pipeline position
At the 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 allocating the temporary local file used before job completion.
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. In a typical failing run, the configured cache path is missing or inaccessible to the download account.
Reproduction record
| Evidence | Why it matters for failed to create tempfile |
|---|---|
| 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 | temporary directory, generated name, account permissions, free space and CreateFile result |
| 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: use a valid writable local temporary path with sufficient space. |
Reading the evidence
| Observation | Interpretation |
|---|---|
| The recorded values match the boundary | The result is consistent with allocating the temporary local file used before job completion; 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 failed to create tempfile 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 allocating the temporary local file used before job completion.
Verification procedure
- Capture
0xC00D1262, it, the exact Player/API operation and the first timestamp at which it appears. - Save temporary directory, generated name, account permissions, free space and CreateFile result; 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: use a valid writable local temporary path with sufficient space.
- Create a fresh operation generation and verify that the original call advances beyond the failed to create tempfile boundary.
Results that may look similar
| Related result | Different diagnostic boundary |
|---|---|
NS_E_BKGDOWNLOAD_INVALIDJOBSIGNATURE | rejecting a background job not created or signed as a Player job |
NS_E_BKGDOWNLOAD_PLUGIN_FAILEDINITIALIZE | initializing the download-manager plug-in instance and its dependencies |
NS_E_BKGDOWNLOAD_NOJOBPOINTER | dereferencing a missing or released background-job interface |
Change the smallest responsible condition
The targeted action is to use a valid writable local temporary path with sufficient space. While retesting it, keep unrelated media, device, playlist and network values unchanged.
When verifying it, 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.
References
- 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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