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NS_E_NO_MULTICAST
The practical meaning of this HRESULT
NS_E_NO_MULTICAST means the Windows Media client is not receiving multicast packets for the selected stream.
The result comes from the multicast receive path after channel or announcement information has been accepted. A representative case is the client joins an announced channel but no UDP packets reach the chosen adapter.
Evidence to preserve
multicast group, UDP port, local interface, join result, packet counters, TTL scope, firewall rules, and server transmission state.
A narrow diagnostic run
- Record and verify: multicast group, UDP port, local interface, join result, packet counters, TTL scope, firewall rules, and server transmission state.
- Run the controlled comparison: join the same group with a packet capture on the selected interface and compare local and upstream packet counters.
Distinguish the neighboring failures
| HRESULT | Meaning in the standard description |
|---|---|
NS_E_WMPFLASH_CANT_FIND_COM_SERVER | To play the selected item, you must install the Adobe Flash Player; To download the Adobe Flash Player, go to the Adobe Web site. |
NS_E_WMPFLASH_INCOMPATIBLEVERSION | To play the selected item, you must install a later version of the Adobe Flash Player; To download the Adobe Flash Player, go to the Adobe website. |
NS_E_WMPOCXGRAPH_IE_DISALLOWS_ACTIVEX_CONTROLS | Windows Media Player cannot play the file because your Internet security settings prohibit the use of ActiveX controls. |
Here, a general network-resource failure can affect unicast; this code isolates absent multicast delivery.
Finish with a repeatable fix
For this occurrence, correct group, interface, routing, IGMP, firewall or server transmission; changing a codec cannot create missing packets.
Authoritative references
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