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NS_E_WMPCORE_PLAYLIST_REPEAT_EMPTY
Meaning at the producing boundary
0xC00D10AC maps to NS_E_WMPCORE_PLAYLIST_REPEAT_EMPTY. Its actionable interpretation is a REPEAT block contains no media items to repeat 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 the REPEAT XML, child count and COUNT value; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
Evidence to capture before retry
Preserve the first occurrence before retry or fallback changes the playback core playlist repeat empty evidence. Capture one consistent object generation:
| Field | What to record |
|---|---|
| Decisive check | Record the REPEAT XML, child count and COUNT value |
| Artifact identity | Resolved base URL for REF or ENTRYREF targets for the playback core playlist repeat empty reproduction |
| Runtime state | Current item index, alternate index and nested-playlist depth for this reproduction |
| Owning object | Repeat/event boundary and the media object expected at its start or end for this reproduction |
| Lower-level result | Playlist URL, format, response content type and exact downloaded bytes for this reproduction |
| Correlation | ASX version and element stack at the failure for this reproduction |
Log paths, hashes, IDs, offsets, and HRESULTs. Exclude secrets and unrelated content from logs.
How this layer works
this workflow must be separated from a generic WMP failure: windows Media metafiles are XML documents, but a well-formed document can still violate required ASX element and attribute rules. It also matters that 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: A repeat wrapper remains after all contained entries were filtered out. The example isolates only the producing component.
A focused diagnostic sequence
- Start with the symbolic value this result; do not diagnose the failure from the final dialog alone.
- Record the bytes or object state that produced this condition before automatic recovery mutates it.
- Exclude a stale callback or superseded object generation as the source of this event.
- Use this deciding observation for this condition: record the REPEAT XML, child count and COUNT value.
- Apply the smallest supported remedy for this condition: add ENTRY/ENTRYREF children or remove the empty block.
Correct the producing condition
The targeted correction for this condition is to add ENTRY/ENTRYREF children or remove the empty block. Keep the original failing input until the same operation succeeds after one controlled change.
- Avoid flattening or rewriting a playlist before preserving the failing nesting and base-URL rules; it can destroy the artifact or state needed to explain this result.
- Avoid assuming every unplayable item means the playlist parser itself failed; that can replace the original HRESULT with a secondary failure from another layer.
Why the symbolic name matters
| Result | Different boundary |
|---|---|
NS_E_WMPCORE_PLAYLIST_REPEAT_START_MEDIA_NONE | The runtime cannot find the Media object that should mark the beginning of a REPEAT block |
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_CURRENT_MEDIA_NOT_ACTIVE | The requested action targets a Media object that is not the currently active item |
If this result is followed by a broader “cannot play,” “cannot load,” or “operation failed” result, preserve the earlier event. A later wrapper error may be secondary.
What to search for in traces
Use this result, 0xC00D10AC and the symbolic phrase in traces. Correlate search keys with API and object.
Regression check
After correction, create a fresh Player, control, parser or playlist object and rerun the smallest reproducer for this HRESULT. Verify the resulting resource, list membership, saved file, library object or play state.
Technical references
- Windows Media metafile reference — documentation used to identify the producing boundary of it.
- Metafile elements reference — normative or platform material relevant to it.
- ENTRYREF element — API or format context for this HRESULT.
- REPEAT element It.
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