What does HRESULT 0xC00D2749 (NS_E_DRM_INVALID_PROPERTY) mean?

NS_E_DRM_INVALID_PROPERTY

What this HRESULT isolates

When the client returns NS_E_DRM_INVALID_PROPERTY (0xC00D2749), the decisive condition is a required property was not set by the application, for the invalid property boundary. contact product support for this application. This result belongs to Windows Media DRM client API contract and object lifecycle, specifically the application-facing layer that initializes DRM support, validates parameters and properties, creates specialized objects, and delivers asynchronous status to the caller, during invalid property diagnosis.

The built-in message summarizes the user-visible outcome, while the symbolic phrase “invalid property” preserves the exact WMDRM boundary for diagnosis. For this code, the proof step is to record the exact API, object state, input identity and first lower-level result associated with invalid property.

Minimum incident record

Capture the first occurrence before automatic retry, player teardown, store repair or license reacquisition changes the state, in a invalid property incident. The smallest useful record contains:

• Code-specific proof: record the exact API, object state, input identity and first lower-level result associated with invalid property.
• Protected identity: property name, type, size and initialization order, for this invalid property result.
• Operation state: operation state, callback sequence and cancellation owner, when reproducing invalid property.
• 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, while tracing invalid property.

For the “invalid property” investigation, use KIDs, license IDs, hashes, certificate thumbprints, sizes and timestamps where possible. While diagnosing this result, do not place content keys, complete license blobs, passwords, cookies or decrypted media in ordinary logs, for the boundary.

Triage without destroying evidence

1. Start from 0xC00D2749 and map it to the first WMDRM object that returned it, during invalid property diagnosis.
2. separate content/header evidence, license evidence, machine/device evidence and service/network evidence around “invalid property”.
3. Before retrying this result, check whether another “invalid property” operation was active or whether the previous result may have committed partially.
4. record the exact API, object state, input identity and first lower-level result associated with invalid property.
5. Apply the smallest supported fix: correct the producing DRM state or input and retry with a fresh operation object; avoid resetting unrelated protected state, in a incident.

Why the producing layer matters

Two platform rules frame this result. 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, for this invalid property result. Many operations are asynchronous and stateful, so object lifetime and completion ordering are part of the API contract, when reproducing invalid property.

Recovery at the right layer

The supported response to it is narrow: correct the producing DRM state or input and retry with a fresh operation object,. After correcting it, reopen or recreate the object that owned “invalid property” so cached state from the failed generation is not mistaken for the repair result.

Representative case: The application reaches the invalid property path and receives this exact HRESULT before the higher-level media action can complete.

Why the symbolic name matters

Several values can accompany the “invalid property” condition in one incident. Order the result event chain by timestamp and prefer the first code produced at the lowest specific boundary over a later player-level summary, during invalid property diagnosis.

Shortcuts that make diagnosis worse

• Avoid retrying object creation in a loop without preserving the first HRESULT and runtime versions, in a incident. That changes evidence without demonstrating why it was produced.
• Avoid replacing the DRM HRESULT with a generic application exception before telemetry records it, for this invalid property result. That shortcut can create a second store, identity or policy problem, when reproducing invalid property.
• Do not reduce it to “DRM failed” in telemetry; retain the HRESULT, symbolic name, operation and object identity,.

Completion criteria

A valid regression for it has two fixtures: one that deliberately produces “a required property was not set by the application,. contact product support for this application” and one that applies the targeted correction, while tracing invalid property. Compare callback order, selected license/KID, final rights decision and persistence state; disappearance of the “invalid property” dialog alone is not proof.

Code-specific operational note

The symbolic phrase “invalid property” is the important search and telemetry key for it. Keep it beside the exact value 0xC00D2749; the official message “A required property was not set by the application, for the boundary. Contact product support for this application, during invalid property diagnosis.” is useful to users, but it does not identify the producing API, object generation or protected identity on its own, in a incident.

Technical references

• DRM client interfaces — official Windows Media DRM context for it.
• DRM client programming guide — API and state rules relevant to this the boundary.
• Obtaining the required DRM library — platform documentation used to distinguish it from adjacent results.
• Windows Media DRM error codes — official Windows Media DRM context for it.

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