| Previous | Next |
| NS_E_DRM_EXPIRED_LICENSEBLOB | NS_E_DRM_INCLUSION_LIST_REQUIRED |
NS_E_DRM_INVALID_LICENSEBLOB
Meaning in the active workflow
The first actionable fact in NS_E_DRM_INVALID_LICENSEBLOB is that the Cardea request contains a license blob that fails format, integrity or binding checks. Diagnosis of this result therefore starts in WMDRM for Network Devices, the layer responsible for 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.
Before changing the machine, preserve blob hash, parser/integrity result and associated content/session IDs.
Diagnostic checklist
| Field | Value |
|---|---|
| Owner | operation, API/callback, object or session identifier, and component/device version associated with this result |
| Direct check | preserve blob hash, parser/integrity result and associated content/session IDs |
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by this result |
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence it |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final it wrapper |
Preserve the original generation
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 for it 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 Cardea request contains a license blob that fails format, integrity or binding checks.
Failure model
The transition that returns it begins with preserve blob hash, parser/integrity result and associated content/session IDs. If that observation matches, the next state cannot be reached until the implementation can regenerate the blob through the licensed DRM API rather than editing it. Use a known-good counterpart only as a control; do not replace the failing artifact before its identifiers and hashes are recorded.
What remains unknown
The established fact is that the Cardea request contains a license blob that fails format, integrity or binding checks. 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 it as the first specific result. The object and operation attached to it are usually more diagnostic than a later cleanup or user-interface summary.
Confirm the boundary
- Preserve it and
0xC00D28B4before cleanup, fallback or another media item changes the context. - Compare the failure with a known-good case that changes only the property named by this condition: the Cardea request contains a license blob that fails format, integrity or binding checks.
- Apply the narrow correction for it: regenerate the blob through the licensed DRM API rather than editing it.
- Associate it with its current WMDRM for Network Devices object and the requested action.
- Run the direct check for it: preserve blob hash, parser/integrity result and associated content/session IDs.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
Compare neighboring states
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_ATTRIBUTE_TOO_LONG | a WMDRM-ND attribute name or value exceeds the protocol/API limit |
NS_E_DRM_EXPIRED_LICENSEBLOB | the license blob carried in the Cardea request has passed its validity interval |
NS_E_DRM_INCLUSION_LIST_REQUIRED | the requested operation requires an inclusion list that the license does not contain |
Operational response
Repair the owner of the check: regenerate the blob through the licensed DRM API rather than editing it. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- A broad reset is not the first step for it; 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 it; that bypasses the decision instead of correcting its input.
- Retain one failing artifact and one corrected artifact so the resolution of it can be regression-tested.
Confirm the same workflow
For the final it test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply.
Technical references
- Windows Media DRM 10 for Network Devices — defines the platform objects used when diagnosing it.
- Device registration — documents the protocol or API boundary behind it.
- Using the WMDRM-ND protocol — provides the normative workflow relevant to it.
- MS-DRMND protocol specification — lists the security and state transitions used to interpret it.
Looking for a different code? Search another status or error code.