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VSS_S_ASYNC_CANCELLED
VSS_S_ASYNC_CANCELLED means that a VSS asynchronous operation was canceled, typically after a requester called IVssAsync::Cancel. It is a final state: the requested work did not complete normally.
What to do
- Do not use incomplete writer metadata, snapshot data, or import results from the canceled operation.
- Determine whether the cancellation was intentional, caused by shutdown, or triggered by timeout handling in the requester.
- Start a new VSS request sequence when a retry is appropriate; do not resume the canceled one.
Microsoft: IVssAsync::QueryStatus
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