| Previous | Next |
| NS_E_WMPCORE_MEDIA_UNAVAILABLE | NS_E_WMPCORE_NO_PLAYABLE_MEDIA_IN_PLAYLIST |
NS_E_WMPCORE_WMX_ENTRYREF_NO_REF
What this HRESULT actually isolates
Windows Media Player reports NS_E_WMPCORE_WMX_ENTRYREF_NO_REF (0xC00D10B4) when an ENTRYREF element was parsed without its required HREF target. The playback core WMX ENTRYREF no REF condition is owned by 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 ENTRYREF XML and base URL used for resolution; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
Inputs that distinguish the causes
Preserve the first occurrence before retry or fallback changes the playback core WMX ENTRYREF no REF evidence. Capture one consistent object generation:
| Field | What to record |
|---|---|
| Decisive check | Record the ENTRYREF XML and base URL used for resolution |
| 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 boundary and the media object expected at its start or end for this reproduction |
Log paths, hashes, IDs, offsets, and HRESULTs. Exclude secrets and unrelated content from logs.
The surrounding WMP state
Representative case: A templated ENTRYREF remains after its target URL was omitted. The example isolates only the producing component.
Do not confuse it with nearby results
| Result | Different boundary |
|---|---|
NS_E_WMPCORE_NO_PLAYABLE_MEDIA_IN_PLAYLIST | The playlist parsed, but every item failed availability, format, rights or graph checks |
NS_E_WMPCORE_PLAYLIST_EMPTY_NESTED_PLAYLIST_SKIPPED_ITEMS | A nested playlist yields no playable items after invalid or unsupported children are skipped |
NS_E_WMPCORE_PLAYLIST_IMPORT_FAILED_NO_ITEMS | Library import produced no items from the selected playlist |
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.
Investigation order
- 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 ENTRYREF XML and base URL used for resolution.
- Apply the smallest supported remedy for this condition: supply a valid HREF to an external metafile or remove the empty element.
Verification after correction
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.
What a real fix must change
The targeted correction for this condition is to supply a valid HREF to an external metafile or remove the empty element. 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.
Code-specific operational note
Use this result, 0xC00D10B4 and the symbolic phrase in traces. Correlate search keys with API and object.
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.
Looking for a different code? Search another status or error code.