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NS_E_WMPCORE_INVALIDPLAYLISTMODE
What this HRESULT actually isolates
0xC00D1081 maps to NS_E_WMPCORE_INVALIDPLAYLISTMODE. Its actionable interpretation is the playlist manager received a play-mode value it does not implement within the Windows Media playlist and metafile state machine; the producing mechanism is the layer that turns ASX/WAX/WVX/WMX or library playlists into Media objects, resolves REF and ENTRYREF URLs, expands nesting, handles EVENT and REPEAT blocks and advances to alternates.
An additional test is to record play mode, source of the value and Player version; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
How this layer works
Representative case for playback core invalid playlist mode: A host passes its own enum value where WMP expects normal or shuffle semantics.
Evidence to capture before retry
Preserve the first occurrence before retry or fallback changes the evidence. Capture one consistent object instance:
| Field | What to record |
|---|---|
| What to verify | Record play mode, source of the value and Player version |
| Artifact identity | Playlist URL, format, response content type and exact downloaded bytes for this reproduction |
| Runtime state | ASX version and element stack at the failure for this reproduction |
| Owning object | Resolved base URL for REF or ENTRYREF targets for this reproduction |
| Lower-level result | Current item index, alternate index and nested-playlist depth for this reproduction |
| Correlation | Repeat/event point and the media object expected at its start or end for this reproduction |
Why the symbolic name matters
| Result | Different condition |
|---|---|
NS_E_WMPCORE_ITEMNOTINPLAYLIST | The requested Media object is not a member of the current Playlist generation |
NS_E_WMPCORE_PLAYLISTEMPTY | The current playlist contains zero media items at the point an item is required |
NS_E_WMPCORE_PLAYLIST_EMPTY_OR_SINGLE_MEDIA | The requested playlist operation requires multiple items, but the list has at most one |
A focused diagnostic sequence
- Use this deciding observation for this condition: record play mode, source of the value and Player version.
- Apply the smallest supported remedy for this condition: use a supported mode or translate application-specific modes before calling WMP.
Correct the producing condition
The targeted correction for this condition is to use a supported mode or translate application-specific modes before calling WMP. Keep the original failing input until the same operation succeeds after one controlled change.
Regression check
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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