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| NS_E_WMPCORE_PLAYLIST_REPEAT_EMPTY | NS_E_WMPCORE_PLAYLIST_REPEAT_END_MEDIA_NONE |
NS_E_WMPCORE_PLAYLIST_REPEAT_START_MEDIA_NONE
The exact condition behind the dialog
The symbolic result NS_E_WMPCORE_PLAYLIST_REPEAT_START_MEDIA_NONE narrows 0xC00D10AD to the playback core playlist repeat start media none condition: the runtime cannot find the Media object that should mark the beginning of a REPEAT block. Keep the playback core playlist repeat start media none boundary visible when a later dialog reduces it to a general media error.
An additional test is to record repeat start node, parsed object identity and mutations after playlist construction; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
What succeeds before this failure
Two rules frame this diagnosis. First, Windows Media metafiles are XML documents, but a well-formed document can still violate required ASX element and attribute rules. In this case, relative references are resolved against the containing metafile URL, and nested playlists introduce a stack and a new base URL rather than a simple flat list.
Representative case: Editing removes the first repeated item while the repeat structure still points to it.
State worth preserving
Capture state before Player cleanup:
- What to verify: record repeat start node, parsed object identity and mutations after playlist construction.
- Artifact: repeat/event state and the media object expected at its start or end.
- State: playlist URL, format, response content type and exact downloaded bytes.
- Object identity: ASX version and element stack at the failure.
- Underlying evidence: resolved base URL for REF or ENTRYREF targets.
- Correlation: current item index, alternate index and nested-playlist depth.
Reproduce without destroying evidence
- Use this deciding observation for this condition: record repeat start node, parsed object identity and mutations after playlist construction.
- Apply the smallest supported remedy for this condition: restore or rebuild the missing start boundary before executing the repeat block.
Related HRESULTs with different meanings
| Result | Different condition |
|---|---|
NS_E_WMPCORE_PLAYLIST_REPEAT_EMPTY | A REPEAT block contains no media items to repeat |
NS_E_WMPCORE_PLAYLIST_REPEAT_END_MEDIA_NONE | The runtime cannot find the Media object that should mark the end of a REPEAT block |
NS_E_WMPCORE_INVALID_PLAYLIST_URL | The playlist URL is syntactically invalid or unusable by the playlist manager |
Recovery at the right layer
The targeted correction for this condition is to restore or rebuild the missing start boundary before executing the repeat block. Keep the original failing input until the same operation succeeds after one controlled change.
How to know the repair is real
Technical references
- Windows Media metafile reference — documentation for this HRESULT.
- Metafile elements reference — normative or platform material relevant to this HRESULT.
- ENTRYREF element — API or format context.
- REPEAT element
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