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NS_E_WALKER_USAGE
NS_E_WALKER_USAGE — 0xC00D004E
Diagnosing NS_E_WALKER_USAGE
NS_E_WALKER_USAGE identifies this Windows Media Services boundary: there was a usage error with file parser.
Why this boundary matters
This HRESULT belongs to media identification, parsing or stream/reference interpretation. Preserve the original bytes or references, the selected parser/protocol and the first rejected field, block or offset so a different test file does not hide the failing input.
Evidence to collect
| Field | What to preserve |
|---|---|
| Input | Exact URL/path, content hash or reference list presented to the parser/walker. |
| Selector | Parser, walker, protocol or stream type selected for that input. |
| Failure point | First rejected field, block, reference or stream offset when the component exposes it. |
| Lower result | First parser/read/protocol status before the server-level HRESULT is reported. |
Decision rule
A different file is only a control. The repair must make the original bytes or references pass the same parser/protocol boundary without silently substituting another input.
Focused test
Capture the parser/walker invocation and its input parameters, then correct the invalid parser usage without changing the underlying media content.
Verification
Use the same media bytes or reference list and the same intended parser/protocol. The fix is demonstrated when that original input passes the previously failing parse/selection stage; a different file is only a control.
Technical references
- System playlist parser plug-ins
- Using URL and server rollover
- Windows Media protocol glossary
- Microsoft HRESULT values for the Windows Media namespace
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