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NS_E_DRM_GET_LICENSESTRING_ERROR
How to classify this result
When the client returns NS_E_DRM_GET_LICENSESTRING_ERROR (0xC00D273C), the relevant condition is the client cannot obtain the serialized license string from the selected record. This result belongs to local license store, secure store and machine binding, specifically the protected repositories that hold licenses and DRM state, together with the hardware and checkpoint data used to bind that state to one installation.
Record license identity, requested representation and returned length/status.
Minimum incident record
- Code-specific proof: record license identity, requested representation and returned length/status.
- Protected identity: first store API call that failed: open, enumerate, save, close or query.
- Operation state: license identifier and content key identifier (KID).
- Persistence or transport: store path, file generation, access result and underlying system error.
- Security context: hardware identity and the last hardware or operating-system change.
- Correlation point: checkpoint, secure-store and registry persistence sequence.
Why the producing layer matters
Two platform rules frame this result. 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. Machine-bound state cannot be diagnosed safely by copying store files between computers or by deleting the original before evidence is preserved.
Triage without destroying evidence
- Locate the earliest API return, callback or event containing this result and
0xC00D273C. - Identify the exact content, license, store, device or migration object instance involved in “get licensestring error”.
- Determine whether “get licensestring error” occurred before network exchange, during response validation, while enforcing policy, or while committing protected state.
- Perform the code-specific check: record license identity, requested representation and returned length/status.
- Make one targeted change — replace or reacquire the malformed/inaccessible license record — and repeat the same producing operation.
Why the symbolic name matters
| Result | Different condition |
|---|---|
NS_E_DRM_GET_LICENSE_ERROR | Retrieval of a license from the local store failed after lookup began. |
NS_E_DRM_LICENSE_CLOSE_ERROR | Closing or committing an opened license record failed. |
NS_E_DRM_LICENSE_OPEN_ERROR | Opening the local license repository or selected license record failed. |
Shortcuts that make diagnosis worse
- Avoid copying a protected license store from another computer as a repair.
- Avoid deleting or resetting DRM state before recording hashes, timestamps and the first store error.
Recovery at the right layer
To correct this, replace or reacquire the malformed/inaccessible license record.
Representative case: License metadata is found, but serialization of the license string fails.
Completion criteria
After the repair, recreate the WMDRM object and run the smallest reproducer. Confirm that 0xC00D273C no longer occurs, that the intended license action completes, and that no store, certificate, clock or migration warning replaces it.
Code-specific operational note
The user-facing message “License storage is not working. Contact Microsoft product support.” describes the visible condition but does not identify the producing API, object instance, or protected identity by itself.
Technical references
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