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NS_E_ALREADY_CONNECTED
What NS_E_ALREADY_CONNECTED means
NS_E_ALREADY_CONNECTED (0xC00D0010) means Windows Media Services already has the requested connection and will not create the same logical connection again as a new one.
Evidence to preserve
Record the existing connection/session identity, endpoint, protocol, owner, and the call that is attempting the duplicate connect.
Interpretation
This is a lifecycle/idempotency result. It can indicate a duplicate request or missed completion event rather than a network failure.
Recovery and verification
Reuse the existing valid connection or close it cleanly before creating another. Prevent concurrent connect attempts from racing on the same session.
Technical references
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