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NS_S_TRACK_ALREADY_DOWNLOADED
Requested Windows Media track is already downloaded
NS_S_TRACK_ALREADY_DOWNLOADED is HRESULT 856929 (0x000D1361) from Windows Media. AllStat describes it as “this condition.” In the Windows Media Player, Windows Media Format, DRM, or Media Foundation state machine, the value reports a nonfailure state that must not be collapsed into plain S_OK.
The high-level request that returned this result is complete only after the caller validates the represented condition.
What must be true before accepting it
Verify that the existing local asset matches the requested catalog item, version, and integrity requirements. That proof prevents usable partial state from being confused with full completion.
Also confirm that returned outputs belong to the current operation generation and were not inherited from an earlier attempt.
Where the status is encountered
- Windows Media Player library, playlist, store, or UI plug-in callbacks; capture the exact API, object, and phase because the same numeric success severity does not define the state by itself.
- Windows Media Format source, writer, DRM, publishing-point, or installation operations;
- Media Foundation topology activation and remote-component setup;
Keep it attached to the operation that returned it. Interpreting it outside that API contract can turn a normal continuation or partial result into an incorrect retry or false completion.
Correct handling and recovery
Reuse or reveal the local copy after validating its identity and hash. Ask before replacing it, and download again only when the catalog version or local integrity differs.
A new attempt following it should be triggered by a meaningful transition, not merely by elapsed time.
Practical scenario
A sync operation requests a track already present in the library. The client verifies the catalog ID and checksum, then skips network transfer and updates only metadata.
Difference from nearby results
This is not a duplicate transfer failure; it reports that the desired postcondition may already exist locally.
Precise classification of it selects the correct wait, stop, retry, cleanup, or disclosure path.
References
- Microsoft: Windows Media Format SDK error and success codes
- Microsoft: Windows Media Player SDK
- Microsoft: Media Foundation SDK
- Microsoft: HRESULT values
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