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STATUS_GRAPHICS_CANT_LOCK_MEMORY
CPU access is the failing operation
A graphics allocation can exist without being safely lockable for CPU access. This status identifies failure to probe and lock the allocation backing memory; it should not be interpreted as permission to dereference a previously expected CPU pointer or as proof that the GPU resource has been destroyed.
Inspect placement and lock requirements
Record the allocation flags, segment type, CPU visibility, aperture configuration, lock mode, and pending GPU use. Distinguish this status from STATUS_GRAPHICS_ALLOCATION_BUSY, which means an allocation is currently in use, and from an invalid handle or closed allocation, which is a lifecycle error.
References
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