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NS_E_DRM_BAD_REQUEST
Read the code before the dialog
The producer of 0xC00D28B0 has determined that a WMDRM-ND request has invalid framing, fields or message semantics. NS_E_DRM_BAD_REQUEST comes from WMDRM for Network Devices, whose state machine implements the transmitter/receiver protocol that registers a network playback device, approves it, validates proximity, opens a protected session and transcrypts licensed content for that receiver.
Start by preserving raw message length/type and parser failure offset without exposing protected secrets.
Correlate the owner and the policy
A complete incident ties together device certificate and serial number, registration-database entry, approval flag, validation timestamp, network session, protocol message and transcrypt policy; the minimum correlation set is the exact WMDRM-ND message type, device identifier, certificate chain, registration state, round-trip timing and the first protocol HRESULT.
A later generic error must not replace this evidence: the original condition remains that a WMDRM-ND request has invalid framing, fields or message semantics.
Why the first HRESULT matters
When documenting this result, state the rejected input and the expected successor state. The rejected input is demonstrated when you preserve raw message length/type and parser failure offset without exposing protected secrets; the successor becomes reachable after you correct the sender implementation and regenerate the request. The result comparison should preserve content and device identity so success cannot be attributed to testing a different asset.
Minimum evidence set
| Field | Value |
|---|---|
| Owner | operation, API/callback, object or session identifier, and component/device version associated with this result |
| Direct check | preserve raw message length/type and parser failure offset without exposing protected secrets |
Contrast with related results
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_CERTIFICATE_SECURITY_LEVEL_INADEQUATE | the peer certificate is valid but its security level is below the operation’s minimum |
NS_E_DRM_UNABLE_TO_OPEN_PORT | the application cannot bind the port used for WMDRM-ND proximity messages |
NS_E_DRM_INVALID_CRL | the certificate revocation list used by WMDRM-ND is malformed, corrupt or unverifiable |
The final dialog can be broader
A WMDRM-ND request has invalid framing, fields or message semantics.
A controlled reproduction
- Preserve it and
0xC00D28B0before cleanup, fallback or another media item changes the context. - Run the direct check: preserve raw message length/type and parser failure offset without exposing protected secrets.
- Compare the failure with a known-good case that changes only the property named by this condition: a WMDRM-ND request has invalid framing, fields or message semantics.
- Apply the targeted fix: correct the sender implementation and regenerate the request.
- Associate it with its current WMDRM for Network Devices object and the requested action.
Recovery at the right layer
The appropriate response is to correct the sender implementation and regenerate the request.
- Preserve the evidence before making changes.
Technical references
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