What does HRESULT 0x400D14BE (NS_I_PLAYLIST_CHANGE_RECEDING) mean?

NS_I_PLAYLIST_CHANGE_RECEDING

Server-side meaning of NS_I_PLAYLIST_CHANGE_RECEDING

Mechanism and scope

This result (0x400D14BE) marks the playlist changed while the server was traversing it in reverse. Although the visible symptom may be interrupted playback, this HRESULT is raised at an administrative or distribution checkpoint.

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.

Test the owning precondition

1. Capture 0x400D14BE, this result, the exact API/administrative action and the first failure timestamp.
2. Preserve entry list before and after mutation, active iterator position, change event and receding command sequence.
3. confirm that the object still belongs to the current WMServer, publishing-point or presentation generation.
4. Perform one isolated experiment: refresh the iterator/current entry and decide whether to continue from the new predecessor.
5. Repeat the original the operation through the same protocol and service account; do not substitute a different client-side test.
6. After this result, verify the expected next state and retain any later HRESULT as a separate pipeline result.

For automated tests, assert both the HRESULT and the resulting publishing-point, playlist, plug-in or archive state.

Code-specific failure anatomy

In a representative incident, the server reaches the playlist changed while the server was traversing it in reverse and rejects the operation before the caller can safely assume the next stage occurred. The incident record should therefore join entry list before and after mutation, active iterator position, change event and receding command sequence with the object generation and the exact administrative or protocol request.

A useful negative control is refresh the iterator/current entry and decide whether to continue from the new predecessor. 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 logging it as a fatal media-file error; it is an informational state transition. That action does not test the distinction that matters here: end receding means no prior entry remains; it says the collection changed during the traversal. This distinction is also why monitoring should retain the symbolic name instead of storing only a generic COM failure.

Evidence that separates this code

Verification outcomes

Changes that do not establish the cause

• logging it as a fatal media-file error; it is an informational state transition.
• avoid changing the publishing point, protocol, content and plug-in set in one test., such a test cannot show which precondition cleared the code.
• Do not suppress it or replace it with a generic “media server error”; retain the symbolic code and owning operation in telemetry.

Comparison with adjacent states

Primary distinction: end receding means no prior entry remains; it says the collection changed during the traversal.

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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