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NS_E_BAD_DELIVERY_MODE
NS_E_BAD_DELIVERY_MODE: the failing boundary
NS_E_BAD_DELIVERY_MODE (0xC00D003A) means The specified delivery mode is invalid. The important boundary is delivery-mode validation; do not replace this result with a broader “Windows Media failed” diagnosis.
What this result proves
This code proves that the requested delivery mode is not one of the modes accepted by the owning Windows Media component. It does not, by itself, prove a codec, permissions, network, device, or media problem outside that boundary. Preserve the first lower-level result when one exists, because later Player or Encoder errors can hide the original cause.
Evidence and focused verification
Record the numeric/enum value and api that rejected it; select a documented mode for that same operation. Keep the media object, endpoint, profile, or device identity fixed while changing only that rejected precondition. A successful retest should pass this exact boundary; a different HRESULT from a later stage is new evidence, not recurrence of NS_E_BAD_DELIVERY_MODE.
Technical references
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