| Previous | Next |
| NS_E_DRM_SIGNATURE_FAILURE | NS_E_DRM_BUSY |
NS_E_DRM_LICENSE_SERVER_INFO_MISSING
Failure scope
For NS_E_DRM_LICENSE_SERVER_INFO_MISSING, the failed contract is that the client cannot read configuration that identifies or describes the license service. Diagnosis of this result therefore starts in Windows Media DRM client internals, the layer responsible for the client DRM engine that initializes security components, validates content and license identifiers, performs individualization, manages license chains and coordinates protected playback capabilities.
The investigation becomes concrete when you record the expected registry/configuration key and caller bitness/security context.
Data worth retaining
Do not separate this result from its owning state: DRM component version, KID, content header signature, license chain, uplink license, individualization state, portable-device registrations and local configuration. The diagnostic record for it is the KID and header hash, DRM component version, individualization status, license-chain identifiers, registry/configuration lookup and the first client callback reporting failure.
The comparison is useful only if it preserves the fact that the client cannot read configuration that identifies or describes the license service.
Test without erasing evidence
- Preserve this result and
0xC00D2840before cleanup, fallback or another media item changes the context. - Associate it with its current Windows Media DRM client internals object and the requested action.
- Run the direct check for it: record the expected registry/configuration key and caller bitness/security context.
- Compare the failure with a known-good case that changes only the property named by this condition: the client cannot read configuration that identifies or describes the license service.
- Apply the narrow correction for it: restore the correct license-server configuration rather than hard-coding a guessed URL.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
The transition to retest
It should be modeled as a failed precondition, not as an arbitrary media exception. Demonstrate the precondition by choosing to record the expected registry/configuration key and caller bitness/security context, and remove it by choosing to restore the correct license-server configuration rather than hard-coding a guessed URL. The result comparison should preserve content and device identity so success cannot be attributed to testing a different asset.
Separate cause from wrapper
The established fact is that the client cannot read configuration that identifies or describes the license service. 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.
Verification inputs
| Field | Value |
|---|---|
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by it |
| 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 |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
| Direct check | record the expected registry/configuration key and caller bitness/security context |
Different owners, similar dialog
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_NEED_UPGRADE_PD | portable-device DRM components require a newer version before protected transfer can continue |
NS_E_DRM_SIGNATURE_FAILURE | creation or verification of a protected content header signature failed |
NS_E_DRM_BUSY | another process or operation holds the DRM subsystem lock |
When a retry is valid
The next attempt becomes meaningful only after you restore the correct license-server configuration rather than hard-coding a guessed URL. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- It: Do not replace DRM binaries or registry state before recording their versions and signatures; otherwise a component mismatch and a damaged license object become indistinguishable.
- 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.
Final verification
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 client interfaces — documents the protocol or API boundary behind it.
- Digital Rights Management features — provides the normative workflow relevant to it.
- Licenses and the local license store — lists the security and state transitions used to interpret it.
- Windows Media Format SDK error codes — defines the platform objects used when diagnosing it.
Looking for a different code? Search another status or error code.