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NS_E_WMP_URLDOWNLOADFAILED
What this HRESULT actually isolates
Windows Media Player reports NS_E_WMP_URLDOWNLOADFAILED (0xC00D0FEA) when the Player failed while retrieving the requested URL before the resource could be consumed. The URL download failed condition is owned by the boundary where the Player resolves a path or URL, opens a source or destination, downloads or serializes content and commits the resulting playlist, skin or media-related file.
An additional test is to capture final URL, redirects, status, content type, proxy/TLS result and bytes received; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
Investigation order
- Preserve
0xC00D0FEA, the ErrorItem context and the object instance involved in URL download failed. - Confirm the failure directly: capture final URL, redirects, status, content type, proxy/TLS result and bytes received.
- After you correct the transport/authentication/resource failure and verify the exact payload, recreate the owning WMP object and verify that the corrected generation completes.
The surrounding WMP state
Download, parse and save are separate stages: a successful HTTP response does not prove that the payload is valid or that the destination can be committed. A second relevant constraint is that read-only attributes, sharing modes, redirected paths and streamed sources can prevent persistence even when playback succeeds.
Representative case: The skin URL redirects to an authentication page instead of the archive.
Inputs that distinguish the causes
| Field | What to record |
|---|---|
| What to verify | Capture final URL, redirects, status, content type, proxy/TLS result and bytes received |
| Artifact identity | Original URL/path and final redirected or canonical location for this reproduction |
| Runtime state | HTTP status/content type or local CreateFile-style access outcome for this reproduction |
| Owning object | Destination directory, temporary file and final rename/replace result for this reproduction |
| Lower-level result | File attributes, owner, ACL and sharing handles for this reproduction |
| Correlation | Bytes received/written, expected length and final hash for this reproduction |
Do not confuse it with nearby results
| Result | Different condition |
|---|---|
NS_E_WMP_FAILED_TO_SAVE_FILE | The Player reached its save path but could not commit the requested file |
NS_E_WMP_SAVEAS_READONLY | The final destination is an existing read-only file that WMP will not overwrite |
NS_E_WMP_FAILED_TO_OPEN_WMD | The Windows Media Download package cannot be opened and interpreted |
Verification after correction
Keep one fixture that reproduces 0xC00D0FEA and one corrected fixture that changes only the identified precondition.
What a real fix must change
Change the responsible precondition rather than masking the symptom: correct the transport/authentication/resource failure and verify the exact payload.
- Avoid retrying save under a new name without recording the failing destination and access mode; it can destroy the artifact or state needed to explain this result.
- Avoid treating a downloaded error page as a valid playlist, skin or media package; that can replace the original HRESULT with a secondary failure from another layer.
Technical references
- Supported protocols and file types — API or format context.
- File name extensions — documentation for this result.
- Windows Media Player SDK — normative or platform material relevant to this result.
- Error handling in the WMP object model
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