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NS_E_WMPCORE_WMX_LIST_ATTRIBUTE_NAME_EMPTY
Diagnosing NS_E_WMPCORE_WMX_LIST_ATTRIBUTE_NAME_EMPTY
0xC00D1091 maps to this result. Its actionable interpretation is a list-level WMX attribute is present with an empty name 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.
Evidence that separates the result
| Field | What to record |
|---|---|
| Decisive check | Record the list element, serializer output and raw bytes around the blank attribute name |
| 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 |
Representative case for playback core WMX list attribute name empty: A playlist serializer creates an attribute slot but writes no name before its equals sign. The example isolates only the producing component.
Focused test and correction
- Perform the code-specific test: record the list element, serializer output and raw bytes around the blank attribute name.
- Make the narrow correction—emit a recognized nonempty list-level attribute name or omit the attribute—and repeat the same producing operation.
Nearby results with different boundaries
| Result | Different boundary |
|---|---|
NS_E_WMPCORE_NO_REF_IN_ENTRY | An ASX ENTRY element has no usable REF child after parsing |
NS_E_WMPCORE_WMX_LIST_ATTRIBUTE_VALUE_EMPTY | A recognized list-level WMX attribute has an empty value where one is required |
NS_E_WMPCORE_WMX_LIST_ITEM_ATTRIBUTE_NAME_EMPTY | An item-level WMX attribute is emitted without a name |
Verification
Repeat the original operation with a fresh owning object after the identified precondition is corrected. Treat this result as resolved only when that same operation passes this stage; preserve any later HRESULT as a separate failure.
Technical references
- Windows Media metafile reference — normative or platform material relevant to this result.
- Metafile elements reference — API or format context for this HRESULT.
- ENTRYREF element — documentation used to identify the producing boundary of this result.
- REPEAT element
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