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MF_E_NET_BAD_REQUEST
MF_E_NET_BAD_REQUEST means the server rejected the request as invalid. The URL, query parameters, request headers, control message, or requested publishing point may be malformed.
What to check for MF_E_NET_BAD_REQUEST
- Compare the request URL and headers with a known-good player request.
- Check URL encoding, path mapping, and any proxy rewrite rules.
- Review server logs for the specific parsing or validation failure.
Microsoft: Networking in Media Foundation
Microsoft: Windows Media Services publishing points
Diagnostic interpretation
This result has the HRESULT value 0xC00D427F. AllStat records the condition as “The request could not be understood by the server.%0”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the mf / net / request operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original mf / net / request condition.
Retry and recovery
%0” has changed.
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