What does HRESULT 0xC00D11C1 (NS_E_WMP_CONNECT_TIMEOUT) mean?

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Description:

Windows Media Player cannot play the file because the server is not responding. Verify that you are connected to the network, and then try again later.%0

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NS_E_WMP_NETWORK_ERROR	NS_E_WMP_MULTICAST_DISABLED

NS_E_WMP_CONNECT_TIMEOUT

Diagnosing NS_E_WMP_CONNECT_TIMEOUT in the Windows Media Player playback path

NS_E_WMP_CONNECT_TIMEOUT (0xC00D11C1) is returned when the connection to the origin server did not complete within the Player connect interval.

A timeout does not prove that DNS, authentication, or media parsing failed. Preserve the resolved endpoint, transport, proxy path, elapsed connect time, and whether any connection was established before the deadline.

Controlled playback comparison

Freeze the current object state and collect DNS duration, address order, SYN attempts, proxy bypass, target port and timeout value.
Reproduce this result once without automatic retries or fallback applications.
Change only one precondition: connect to each resolved address and port from the same host, preserving IPv4/IPv6 order.
Compare the first nested status and next Player event with the failed run.
After testing it, restore the original configuration if the change was diagnostic only.

Actions that obscure the cause

raising media buffering duration to solve a TCP connect timeout.

Technical references

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