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NS_E_DRM_DEBUGGING_NOT_ALLOWED
What this HRESULT isolates
The symbolic result NS_E_DRM_DEBUGGING_NOT_ALLOWED narrows 0xC00D2767 to trusted playback path and output restrictions. In practical terms, the protected operation detects that its process is running under a debugger; the producing layer is the protected playback path that authenticates application and driver components and enforces license requirements for audio, digital outputs, burning and other destinations.
Diagnostic inputs that separate the causes
- Protected identity: audio/video driver identity, signature and version.
- Operation state: application certificate and revocation state.
- Persistence or transport: restriction-query result before playback or burn begins.
- Security context: protected-path renewal or component-validation event.
- Correlation point: requested output and protection level.
For the “debugging not allowed” 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.
How to prove the condition
- Start from
0xC00D2767and map it to the first WMDRM object that returned it. - Separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “debugging not allowed”.
- Before retrying this result, check whether another “debugging not allowed” operation was active or whether the previous result may have committed partially.
- Record debugger/instrumentation state and reproduce from an uninstrumented signed build.
- Apply the smallest supported fix: run the protected path without a debugger and use supported external telemetry; avoid resetting unrelated protected state.
What a supported fix should change
The supported response to this result is narrow: run the protected path without a debugger and use supported external telemetry. After correcting it, reopen or recreate the object that owned “debugging not allowed” so the verification does not reuse state from the failed operation.
Representative case: Playback works normally but fails when the process is attached to a debugger.
Common but unsafe responses
- Avoid disabling driver or application authentication to force protected playback.
- Avoid interpreting an output-policy failure as proof that the license itself is corrupt.
Do not merge these HRESULTs
| Result | Different condition |
|---|---|
NS_E_DRM_RESTRICTIONS_NOT_RETRIEVED | The license you are using has associated output restrictions. This license is unusable until these restrictions are queried. |
NS_E_DRM_APPCERT_REVOKED | The application certificate is rejected by WMDRM revocation policy. |
NS_E_DRM_INVALID_APPCERT | The DRM application certificate is malformed, mismatched or cannot be validated. |
How to know the fix is real
A valid regression has two fixtures: one that deliberately produces “the protected operation detects that its process is running under a debugger” and one that applies the targeted correction. Compare callback order, selected license/KID, final rights decision and persistence state; disappearance of the “debugging not allowed” dialog alone is not proof.
Technical references
- Output protection levels.
- Secure Audio Path model — API and state rules for the DRM operation described here.
- Protected Media Path.
- DRM export and output protection.
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