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NS_E_DRM_PARAMETERS_MISMATCHED
Where the operation stopped
NS_E_DRM_PARAMETERS_MISMATCHED is Windows Media DRM HRESULT 0xC00D272F. It identifies related DRM parameters describe different content, license, operation or object state. The useful scope is the application-facing layer that initializes DRM support, validates parameters and properties, creates specialized objects, and delivers asynchronous status to the caller; it is not a generic statement that the media player, network or file system failed.
Diagnostic sequence
- Start from
0xC00D272Fand map it to the first WMDRM object that returned it. - Separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “parameters mismatched”.
- Before retrying this result, check whether another “parameters mismatched” operation was active or whether the previous result may have committed partially.
- Log parameter identities, KIDs, object instance and the method receiving them.
- Apply the smallest supported fix: rebuild the call from one coherent content and operation context; avoid resetting unrelated protected state.
Evidence worth preserving
- Protected identity: property name, type, size and initialization order.
- Operation state: operation state, callback sequence and cancellation owner.
- Persistence or transport: first inner HRESULT before an application replaces it with a generic error.
- Security context: exact interface method and object type being created.
- Correlation point: SDK/runtime version and linked DRM stub library.
The surrounding protocol and store state
The DRM client exposes different objects for license management, individualization, encryption, backup, metering and device registration; failure to create one object does not prove that all DRM state is damaged. Many operations are asynchronous and stateful, so object lifetime and completion ordering are part of the API contract.
Correcting the producing condition
The supported response to this result is narrow: rebuild the call from one coherent content and operation context. After correcting it, reopen or recreate the object that owned “parameters mismatched” so the verification does not reuse state from the failed operation.
Representative case: A license object from one file is combined with header data from another.
Related codes and the diagnostic split
| Result | Different condition |
|---|---|
NS_E_DRM_UNABLE_TO_CREATE_LICENSE_OBJECT | The DRM runtime cannot create the license-management object required for this operation. |
NS_E_DRM_UNABLE_TO_CREATE_INDI_OBJECT | The DRM runtime cannot create the individualization object required for this operation. |
NS_E_DRM_UNABLE_TO_CREATE_PROPERTIES_OBJECT | The DRM runtime cannot create the property-access object required for this operation. |
Actions that do not prove a fix
- Avoid replacing the DRM HRESULT with a generic application exception before telemetry records it.
- Avoid retrying object creation in a loop without preserving the first HRESULT and runtime versions.
Regression check
A valid regression has two fixtures: one that deliberately produces “related DRM parameters describe different content, license, operation or object state” and one that applies the targeted correction. Compare callback order, selected license/KID, final rights decision and persistence state; disappearance of the “parameters mismatched” dialog alone is not proof.
Technical references
- DRM client interfaces.
- DRM client programming guide — API and state rules for the DRM operation described here.
- Obtaining the required DRM library.
- Windows Media DRM error codes.
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