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NS_E_PLAYLIST_END_RECEDING
Server-side meaning of NS_E_PLAYLIST_END_RECEDING
Where the boundary sits
This result (0xC00D14BD) marks reverse traversal reached the beginning/end boundary of the playlist. Treat the symbolic name as a map to the owning Windows Media Services subsystem rather than as a request to reinstall every media component.
The WMS playlist parser turns WSX/SMIL or another supported source into an in-memory playlist for a client., entry identity, nesting, current direction and shutdown state matter independently of whether the referenced media file exists. In a this result trace, save the parser-visible playlist after redirects or dynamic generation. While diagnosing it, the server acts on the resolved document and in-memory entry identities, not necessarily the text the operator first opened. The decisive question is whether the live object and values match that boundary; the base AllStat description alone does not reveal the object generation, selected plug-in or lower-level failure.
A controlled correction
- Capture
0xC00D14BD, this result, the exact API/administrative action and the first failure timestamp. - Preserve playback direction, current entry, previous-entry availability and repeat settings.
- confirm that the object still belongs to the current WMServer, publishing-point or presentation generation.
- Perform one isolated experiment: treat the boundary as normal completion or define an explicit reverse/repeat transition.
- Repeat the original the operation through the same protocol and service account; do not substitute a different client-side test.
- After this result, verify the expected next state and retain any later HRESULT as a separate pipeline result.
Repeat the test with a newly resolved server object; a stale COM pointer can make a correct configuration appear unchanged.
Code-specific failure anatomy
In a representative incident, the server reaches reverse traversal reached the beginning/end boundary of the playlist and rejects the operation before the caller can safely assume the next stage occurred. The incident record should therefore join playback direction, current entry, previous-entry availability and repeat settings with the object generation and the exact administrative or protocol request.
A useful negative control is treat the boundary as normal completion or define an explicit reverse/repeat transition. If that change advances the same it call, the result supports this boundary. If it remains, return to the first lower-level event instead of broadening the repair.
The tempting but misleading response is retrying the same recede command without changing position. That action does not test the distinction that matters here: the informational playlist-change result means a modification occurred during reverse traversal rather than that traversal is finished. This distinction is also why monitoring should retain the symbolic name instead of storing only a generic COM failure.
What to record before changing anything
| Evidence | Why it matters for it |
|---|---|
| Decisive state | playback direction, current entry, previous-entry availability and repeat settings. |
| Owning object | Record the server, publishing point, playlist, namespace node, plug-in or cache item that returned it, including its creation or restart time. |
| First lower-level result | Preserve the earliest Win32, socket, COM, parser or plug-in event before the HRESULT; later wrappers can map several causes to it. |
| Controlled comparison | Use a known-good object of the same type and vary only the precondition described as “reverse traversal reached the beginning/end boundary of the playlist”. |
| Security-sensitive data | Log identifiers, lengths, hashes and redacted URLs where possible; do not publish passwords, authorization files or unrestricted client data. |
Reading the second result
| Retest observation | Interpretation |
|---|---|
| The same call still returns it | The rejected precondition has not changed, or the caller is still using an old object/configuration generation. |
| The operation advances and a later code appears | The boundary was cleared. After it, diagnose the new code at its own source, parser, sink, network or client stage. |
| A new object succeeds while the retained object fails | Object lifetime or stale context is part of the incident; update lifecycle handling rather than applying a machine-wide repair. |
| Only one publishing point, playlist, cache key or plug-in fails | The evidence favors object-specific configuration or content over a server-wide outage. |
Changes that do not establish the cause
- retrying the same recede command without changing position.
- a successful ping or local file open is not sufficient proof: the failing service account and Windows Media Services object must perform the same operation.
- Do not suppress it or replace it with a generic “media server error”; retain the symbolic code and owning operation in telemetry.
Related codes are different
Primary distinction: the informational playlist-change result means a modification occurred during reverse traversal rather than that traversal is finished.
| Nearby result | Different checkpoint |
|---|---|
NS_I_PLAYLIST_CHANGE_RECEDING | Compare its own symbolic boundary and the first failing call; it must not be grouped automatically with it. |
NS_E_PLAYLIST_SHUTDOWN | Relative to it, this neighboring result belongs to another state or validation branch even when the user-visible symptom is similar. |
NS_E_PLAYLIST_ENTRY_ALREADY_PLAYING | Use the object type and operation sequence to determine which result is authoritative. |
Technical references
- Server-Side Playlists
- System Playlist Parser Plug-ins
- Programming Playlists
- Microsoft HRESULT registry
Close the incident only after it clears on a current object.
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