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NS_E_DRM_LICENSE_UNAVAILABLE
Start with the producing object
NS_E_DRM_LICENSE_UNAVAILABLE means no license available to the transmitter authorizes the requested WMDRM-ND action. The subsystem producing this result is WMDRM for Network Devices, not the media decoder; it performs 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.
The investigation becomes concrete when you query the content KID and action before transcryption starts.
Relevant runtime state
The security decision represented by this result depends on device certificate and serial number, registration-database entry, approval flag, validation timestamp, network session, protocol message and transcrypt policy. Record the exact WMDRM-ND message type, device identifier, certificate chain, registration state, round-trip timing and the first protocol HRESULT from the same attempt.
The producing layer has not made a claim about every media operation; it has only established that no license available to the transmitter authorizes the requested WMDRM-ND action.
Practical diagnostic path
- Preserve this result and
0xC00D28A2before cleanup, fallback or another media item changes the context. - Run the direct check: query the content KID and action before transcryption starts.
- Compare the failure with a known-good case that changes only the property named by this condition: no license available to the transmitter authorizes the requested WMDRM-ND action.
- Apply the targeted fix: acquire or install a license granting network-device playback.
- Associate it with its current WMDRM for Network Devices object and the requested action.
One-variable comparison
It should be modeled as a failed precondition, not as an arbitrary media exception. Demonstrate the precondition by choosing to query the content KID and action before transcryption starts, and remove it by choosing to acquire or install a license granting network-device playback. The result model is suitable for a regression fixture because its expected state change is observable without weakening the DRM policy.
Do not diagnose the wrong layer
No license available to the transmitter authorizes the requested WMDRM-ND action.
Trace requirements
| Field | Value |
|---|---|
| Direct check | query the content KID and action before transcryption starts |
What another code would mean
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_INVALID_CERTIFICATE | the WMDRM-ND peer certificate is malformed, corrupted or fails signature validation |
NS_E_DRM_CERTIFICATE_REVOKED | the WMDRM-ND peer certificate is explicitly revoked |
NS_E_DRM_DEVICE_LIMIT_REACHED | the transmitter has reached the number of network devices allowed by policy or implementation |
What success looks like
A matching correction is to acquire or install a license granting network-device playback.
- Preserve the evidence before making changes.
Technical references
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