What does HRESULT 0x887A002B (DXGI_ERROR_ACCESS_DENIED) mean?

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The application is trying to use a resource to which it does not have the required access privileges. This is most commonly caused by writing to a shared resource with read-only access.

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DXGI_ERROR_CANNOT_PROTECT_CONTENT	DXGI_ERROR_NAME_ALREADY_EXISTS

DXGI_ERROR_ACCESS_DENIED

DXGI_ERROR_ACCESS_DENIED means that the application attempted to use a DXGI resource without the required access. Microsoft notes a common case: writing to a shared resource that was opened with read-only access.

What to inspect

The sharing flags and access rights used when the resource or shared handle was created and opened.
Which process owns the resource and whether the caller is expected to read, write, or synchronize it.
The lifecycle of the shared handle, including whether a stale handle now refers to a resource with different policy.

Fix the ownership contract

Changing all resources to broad access is not a safe universal workaround. Make the intended producer-consumer and read-write contract explicit, then create or open the resource with the least privileges that satisfy that contract.

Microsoft: DXGI error codes · Microsoft: IDXGIResource1::CreateSharedHandle

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