HRESULT 0xC00D36EA (MF_E_PROPERTY_NOT_EMPTY): meaning and diagnosis

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the property already contains data but the requested operation requires an empty property state.

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MF_E_PROPERTY_EMPTY	MF_E_PROPERTY_VECTOR_NOT_ALLOWED

MF_E_PROPERTY_NOT_EMPTY

MF_E_PROPERTY_NOT_EMPTY indicates a precondition failure on existing property state. The operation expects no current value, but the target property already contains data.

Find who populated the property first

Read and log the current value before the failing operation, including the PROPVARIANT type.
Trace initialization order. Media sources, sinks, or metadata providers can populate properties from parsed file data before application code runs.
Do not overwrite the value automatically unless the API or file-format contract explicitly permits replacement.

Media Foundation supports both v1 IMFMetadata and Shell-style IPropertyStore metadata paths. These APIs expose property values through PROPVARIANT, but write and persistence behavior depends on the provider. For a media source, even deleting an item from an IMFMetadata collection does not modify the original media content. Diagnose the target collection and its lifecycle before clearing data as a workaround.

Microsoft: Media Metadata · Microsoft: IMFMetadata::DeleteProperty · Wine: property HRESULT definitions

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