| Previous | Next |
| NS_E_NO_EXISTING_PACKETIZER | NS_E_RESET_SOCKET_CONNECTION |
NS_E_BAD_SYNTAX_IN_SERVER_RESPONSE
What was rejected
NS_E_BAD_SYNTAX_IN_SERVER_RESPONSE (0xC00D2EFE) means the media-server response could not be understood. The Windows Media message explicitly notes that an incompatible proxy or media server can cause it, so preserve the response bytes/headers before any client parser normalizes them.
Capture the protocol artifact
- Request method, URL and selected streaming protocol.
- Raw status line and headers, including server/proxy identification and declared lengths.
- Response body length and the first parser error/offset if available.
- Whether the response passed through an HTTP proxy, gateway or protocol translator.
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 comparison
Repeat the same request once without the suspect proxy when that is a supported topology, or compare the raw response with a known compatible server using the same protocol. The key question is whether an intermediary changed the syntax or the origin server emitted a response the Windows Media client does not accept.
Verification
After correcting the server/proxy response, capture it again and confirm the same client parses the previously failing stage. Keep a deliberately malformed response fixture if you maintain the server or proxy so parser rejection remains testable.
Technical references
- Windows Media HTTP Streaming Protocol overview
- Receiving a WMSP response
- Windows Media proxy interaction
- Windows media streaming protocol relationships
- Microsoft HRESULT registry
Looking for a different code? Search another status or error code.