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What does HRESULT 0xC00D0FB6 (NS_E_WMPXML_PARSEERROR) mean?

 
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NS_E_WMPXML_ENDOFDATA NS_E_WMPXML_ATTRIBUTENOTFOUND

NS_E_WMPXML_PARSEERROR

The exact condition behind the dialog

Windows Media Player reports NS_E_WMPXML_PARSEERROR (0xC00D0FB6) when the XML parser rejected the supplied document but exposed no more specific WMP parser result. The XML parser parse error condition is owned by the parser that reads skin, playlist or configuration XML and exposes named attributes, processing instructions and parse diagnostics to the Player.

An additional test is to capture the exact bytes, encoding and any lower-level line/column diagnostic; that evidence is more useful than reinstalling the Player or changing several unrelated settings at once.

Investigation order

  1. Start with the symbolic HRESULT; do not diagnose XML parser parse error from the final dialog alone.
  2. Use this deciding observation for this condition: capture the exact bytes, encoding and any lower-level line/column diagnostic.
  3. Apply the smallest supported remedy for this condition: repair the first well-formedness error and parse the unchanged remainder again.

The surrounding WMP state

For this condition, an XML document can be well-formed yet still fail the Windows Media schema or object-model rules expected by the caller. A second relevant constraint is that 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 malformed entity or mismatched end tag prevents the skin or playlist document from being constructed.

Inputs that distinguish the causes

FieldWhat to record
What to verifyCapture the exact bytes, encoding and any lower-level line/column diagnostic
Artifact identityLine/column or byte offset from any lower-level parser diagnostic for this reproduction
Runtime stateSource URL or archive member and a hash of the exact XML bytes for this reproduction
Owning objectEncoding declaration, byte-order mark and parser input length for this reproduction
Lower-level resultLast successful element, attribute or processing-instruction lookup for this reproduction
CorrelationParser state when GetParseError, persist or lookup was called for this reproduction

Do not confuse it with nearby results

ResultDifferent condition
NS_E_WMPXML_ATTRIBUTENOTFOUNDThe requested named attribute or attribute index is absent on the current element
NS_E_WMPXML_ENDOFDATAThe XML input ended while the parser still required bytes to complete a construct
NS_E_WMPXML_NOERRORThe caller requested parse-error details when the parser had no stored error

Verification after correction

What a real fix must change

The targeted correction for this condition is to repair the first well-formedness error and parse the unchanged remainder again. 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.

Technical references


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