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NS_E_DRM_UNSUPPORTED_ACTION
Locate the failing contract
NS_E_DRM_UNSUPPORTED_ACTION is the result to preserve when the WMDRM-ND endpoint or policy does not implement the requested operation. Within WMDRM for Network Devices, NS_E_DRM_UNSUPPORTED_ACTION is raised while processing 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.
A decisive test is to record action identifier and endpoint capability/policy structures. The standard AllStat text is already shown above; this custom section concentrates on the object state and the evidence needed to separate NS_E_DRM_UNSUPPORTED_ACTION from neighboring Windows Media errors.
One-attempt evidence
| Field | Value for NS_E_DRM_UNSUPPORTED_ACTION |
|---|---|
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence NS_E_DRM_UNSUPPORTED_ACTION |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final NS_E_DRM_UNSUPPORTED_ACTION wrapper |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with NS_E_DRM_UNSUPPORTED_ACTION |
| Direct check | record action identifier and endpoint capability/policy structures |
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by NS_E_DRM_UNSUPPORTED_ACTION |
Evidence from one operation
Do not separate NS_E_DRM_UNSUPPORTED_ACTION from its owning state: device certificate and serial number, registration-database entry, approval flag, validation timestamp, network session, protocol message and transcrypt policy. The diagnostic record for NS_E_DRM_UNSUPPORTED_ACTION is the exact WMDRM-ND message type, device identifier, certificate chain, registration state, round-trip timing and the first protocol HRESULT.
This evidence matters because the rejected condition is specifically that the WMDRM-ND endpoint or policy does not implement the requested operation.
Model the rejected precondition
The transition that returns NS_E_DRM_UNSUPPORTED_ACTION begins with record action identifier and endpoint capability/policy structures. If that observation matches, the next state cannot be reached until the implementation can select a supported action or a receiver implementing the required one. For NS_E_DRM_UNSUPPORTED_ACTION, this distinction prevents a license-policy result from being hidden by a later Player dialog and keeps the test attached to the original object generation.
Avoid a false conclusion
For NS_E_DRM_UNSUPPORTED_ACTION, the established fact is that the WMDRM-ND endpoint or policy does not implement the requested operation. For NS_E_DRM_UNSUPPORTED_ACTION, that fact does not independently establish damaged media bytes, a missing decoder, a generally broken network, or invalid rights for every other action.
If the Player, encoder, setup program or device layer later emits a broader error, retain NS_E_DRM_UNSUPPORTED_ACTION as the first specific result. The object and operation attached to NS_E_DRM_UNSUPPORTED_ACTION are usually more diagnostic than a later cleanup or user-interface summary.
A defensible test
- Preserve
NS_E_DRM_UNSUPPORTED_ACTIONand0xC00D28ADbefore cleanup, fallback or another media item changes the context. - Associate
NS_E_DRM_UNSUPPORTED_ACTIONwith its current WMDRM for Network Devices object and the requested action. - Run the direct check for
NS_E_DRM_UNSUPPORTED_ACTION: record action identifier and endpoint capability/policy structures. - Compare the failure with a known-good case that changes only the property named by this condition: the WMDRM-ND endpoint or policy does not implement the requested operation.
- Apply the narrow correction for
NS_E_DRM_UNSUPPORTED_ACTION: select a supported action or a receiver implementing the required one. - Repeat the same action with the same content/device identity and verify that
NS_E_DRM_UNSUPPORTED_ACTIONis not replaced by another policy or trust failure.
Other boundaries in the same family
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_DEVICE_ALREADY_REGISTERED | registration attempts to create a duplicate record for the same device identity |
NS_E_DRM_UNSUPPORTED_PROTOCOL_VERSION | the transmitter and receiver do not share a supported WMDRM-ND protocol version |
NS_E_DRM_CERTIFICATE_SECURITY_LEVEL_INADEQUATE | the peer certificate is valid but its security level is below the operation’s minimum |
Resolution test
Repair the owner of the check: select a supported action or a receiver implementing the required one. For NS_E_DRM_UNSUPPORTED_ACTION, success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- While investigating NS_E_DRM_UNSUPPORTED_ACTION, keep this restriction: Do not delete the complete device-registration database before preserving the failing device record and certificate chain; that removes the distinction between registration, approval, validation and session failures.
- Do not alter trusted time, revocation enforcement, certificate validation or output policy merely to suppress
NS_E_DRM_UNSUPPORTED_ACTION; that bypasses the decision instead of correcting its input. - Retain one failing artifact and one corrected artifact so the resolution of
NS_E_DRM_UNSUPPORTED_ACTIONcan be regression-tested.
Verify without changing the question
For the final NS_E_DRM_UNSUPPORTED_ACTION test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply. The NS_E_DRM_UNSUPPORTED_ACTION case is resolved only when the operation completes without this HRESULT and without a substitute failure from a neighboring license, trust, session or policy check.
Technical references for NS_E_DRM_UNSUPPORTED_ACTION
- Windows Media DRM 10 for Network Devices — defines the platform objects used when diagnosing NS_E_DRM_UNSUPPORTED_ACTION.
- Device registration — documents the protocol or API boundary behind NS_E_DRM_UNSUPPORTED_ACTION.
- Using the WMDRM-ND protocol — provides the normative workflow relevant to NS_E_DRM_UNSUPPORTED_ACTION.
- MS-DRMND protocol specification — lists the security and state transitions used to interpret NS_E_DRM_UNSUPPORTED_ACTION.
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