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NS_E_WMPXML_NOERROR
Where the Player stopped
The symbolic result NS_E_WMPXML_NOERROR narrows 0xC00D0FB4 to the XML parser no error condition: the caller requested parse-error details when the parser had no stored error. Keep the XML parser no error boundary visible when a later dialog reduces it to a general media error.
An additional test is to record the parser call sequence and whether the document had already parsed successfully; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.
What succeeds before this failure
Two rules frame the XML parser no error diagnosis. First, an XML document can be well-formed yet still fail the Windows Media schema or object-model rules expected by the caller. Parser position, source encoding and the exact bytes supplied to the final parse call are more useful than a generic “bad XML” dialog.
Representative case: A host asks for error details after a successful load and interprets the absence of an error record as a document failure. The example isolates only the producing component.
State worth preserving
Capture this state before the Player advances, reloads, rescans or destroys the owning object:
- Decisive check: record the parser call sequence and whether the document had already parsed successfully.
- Artifact: encoding declaration, byte-order mark and parser input length.
- State: last successful element, attribute or processing-instruction lookup.
- Object identity: parser state when GetParseError, persist or lookup was called.
- Underlying evidence: line/column or byte offset from any lower-level parser diagnostic.
- Correlation: source URL or archive member and a hash of the exact XML bytes.
Logs should retain exact paths or URLs, hashes, object IDs, offsets and HRESULT order where applicable. Exclude secrets and unrelated content from logs.
Reproduce without destroying evidence
- Start with the symbolic value this result; do not diagnose it from the final dialog alone.
- Record the bytes or object state that produced this result before automatic recovery mutates it.
- Exclude a stale callback or superseded object generation as the source of the event.
- Use this deciding observation: record the parser call sequence and whether the document had already parsed successfully.
- Apply the smallest supported remedy: treat the result as a diagnostic-state mismatch and call GetParseError only after an actual parse failure.
Related HRESULTs, different boundaries
| Result | Different boundary |
|---|---|
NS_E_WMPXML_ENDOFDATA | The XML input ended while the parser still required bytes to complete a construct |
NS_E_WMPXML_PARSEERROR | The XML parser rejected the supplied document but exposed no more specific WMP parser result |
NS_E_WMPXML_ATTRIBUTENOTFOUND | The requested named attribute or attribute index is absent on the current element |
If this result is followed by a broader “cannot play,” “cannot load,” or “operation failed” result, preserve the earlier XML parser no error event. The later code can be a consequence from a wrapper, fallback item or UI layer rather than the producing failure.
Recovery at the right layer
The targeted correction for the XML parser no error condition is to treat the result as a diagnostic-state mismatch and call GetParseError only after an actual parse failure. Keep the original failing input until the same operation succeeds after one controlled change.
- Avoid rewriting the XML before preserving the failing bytes and parser position; it can destroy the artifact or state needed to explain this result.
- Avoid treating a missing optional node as proof that the whole document is malformed; that can replace the original HRESULT with a secondary failure from another layer.
How to know the repair is real
After the correction, create a fresh Player, control, parser or playlist object and rerun the smallest reproducer for it. Verify the resulting resource, list membership, saved file, library object or play state.
Practical interpretation
Use it, 0xC00D0FB4 and the phrase “XML parser no error” together in traces and issue searches. Keep those keys beside the producing API, object ID, URL or file offset so the event remains distinguishable from a generic Player message.
Technical references
- Windows Media Player SDK — documentation used to identify the producing boundary of it.
- Skin definition XML structure — normative or platform material relevant to it.
- Windows Media metafile reference — API or format context for it.
- XML 1.0 specification It.
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