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NS_E_DRM_CHECKPOINT_FAILED
Where the operation stopped
0xC00D277F maps to NS_E_DRM_CHECKPOINT_FAILED. Read it as a result from local license store, secure store and machine binding: the secure-state checkpoint cannot be created or committed. Keeping the “checkpoint failed” boundary intact prevents a later playback message from hiding the original DRM failure.
State to capture before retry
- Protected identity: checkpoint, secure-store and registry persistence sequence.
- Operation state: first store API call that failed: open, enumerate, save, close or query.
- Persistence or transport: license identifier and content key identifier (KID).
- Security context: store path, file generation, access result and underlying system error.
- Correlation point: hardware identity and the last hardware or operating-system change.
For the “checkpoint failed” investigation, use KIDs, license IDs, hashes, certificate thumbprints, sizes and timestamps where possible. Do not place content keys, complete license blobs, passwords, cookies or decrypted media in ordinary logs.
Place in the DRM workflow
The workflow around this result matters: a license is stored in the protected local license store after acquisition; a store failure is therefore distinct from a server refusing to issue a license. In addition, machine-bound state cannot be diagnosed safely by copying store files between computers or by deleting the original before evidence is preserved.
A useful investigation order
- Start from
0xC00D277Fand map it to the first WMDRM object that returned it. - Separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “checkpoint failed”.
- Record checkpoint generation, store writes and underlying persistence error.
Targeted fix
Representative case: A license update succeeds in memory but checkpoint creation fails.
What not to do first
- Avoid deleting or resetting DRM state before recording hashes, timestamps and the first store error.
Nearby results with different meanings
| Result | Different condition |
|---|---|
NS_E_DRM_UNABLE_TO_LOAD_HARDWARE_ID | The DRM subsystem cannot obtain the machine identity used for protected-state binding. |
NS_E_DRM_UNABLE_TO_OPEN_DATA_STORE | The DRM data-store file cannot be opened. |
NS_E_DRM_DATASTORE_CORRUPT | The DRM data store is readable but fails integrity or structure validation. |
Technical references
- Licenses and the local license store.
- Enumerating licenses in the local store — API and state rules for the DRM operation described here.
- DRM client interfaces.
- Windows Media DRM error codes.
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