What does HRESULT 0xC00D10C2 (NS_E_CHANGING_PROXY_EXCEPTIONLIST) mean?

NS_E_CHANGING_PROXY_EXCEPTIONLIST

Diagnosing NS_E_CHANGING_PROXY_EXCEPTIONLIST in Player settings or the playback graph

NS_E_CHANGING_PROXY_EXCEPTIONLIST (0xC00D10C2) is returned when the proxy bypass list was modified while the protocol was not using custom proxy configuration.

Separate Network-object configuration, graph capabilities, graphics presentation, stream selection and COM ownership before changing playback content. The relevant condition is the proxy bypass list was modified while the protocol was not using custom proxy configuration.

One-variable verification

1. Capture the resource identity and proxy mode, raw exception list, delimiter rules, host being opened and bypass result.
2. Verify that the caller uses the current Playlist, Media, Network, graph, device or DRM object instance.
3. Run the narrow experiment: select custom mode and test one exact hostname with and without a single bypass entry.
4. Do not combine this focused test with a codec-pack change, Player reset, or broad registry cleanup.
5. If the retest returns a different specific HRESULT, diagnose that new failure as the next stage.

Reading the next state

Actions that obscure the cause

• copying browser bypass syntax without checking the WMP Network object contract.

Technical references

• IWMPNetwork interface
• Network object
• Supported protocols and file types
• DirectShow filter graph
• Microsoft HRESULT registry