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NS_E_MLS_SMARTPLAYLIST_FILTER_NOT_REGISTERED
Understanding NS_E_MLS_SMARTPLAYLIST_FILTER_NOT_REGISTERED in a Windows Media playlist
NS_E_MLS_SMARTPLAYLIST_FILTER_NOT_REGISTERED (0xC00D1075) is returned when an auto-playlist references a query filter type for which the Player has no registered implementation.
Distinguish in-memory Playlist state, WPL or ASX parsing, nested-list expansion, Media-object resolution and execution of referenced items. In this case, the failure condition is an auto-playlist references a query filter type for which the Player has no registered implementation.
Minimal playlist experiment
- Freeze the current object state and collect filter name or GUID, smart-playlist XML, installed WMP components, bitness and registration location.
- Reproduce this result once without automatic retries or fallback applications.
- Change only one precondition: replace the unknown filter with one documented built-in condition and rebuild the auto playlist.
- Compare the first nested status and next Player event with the failed run.
- After testing it, restore the original configuration if the change was diagnostic only.
What the result means
| Retest outcome | Interpretation |
|---|---|
| A later HRESULT appears | The rejected condition — an auto-playlist references a query filter type for which the Player has no registered implementation — was cleared; diagnose the new code at its own layer. |
Actions that obscure the cause
- installing unrelated playback codecs.
Technical references
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