What does HRESULT 0xC00D10C3 (NS_E_CHANGING_PROXYBYPASS) mean?

NS_E_CHANGING_PROXYBYPASS

Diagnosing NS_E_CHANGING_PROXYBYPASS in Player settings or the playback graph

NS_E_CHANGING_PROXYBYPASS (0xC00D10C3) is returned when the caller changed the bypass-local flag outside custom proxy mode.

Separate Network-object configuration, graph capabilities, graphics presentation, stream selection and COM ownership before changing playback content. Record what the Player had already completed because later retries often replace the original evidence. The specific rejected condition is the caller changed the bypass-local flag outside custom proxy mode.

One-variable verification

1. Start from the original call and log 0xC00D10C3 together with its object and operation phase.
2. Collect selected protocol, proxy mode, bypass flag, target host classification and effective proxy route before changing the machine.
3. Use this single-variable test: set custom mode and repeat against one short-name intranet host while tracing whether the proxy is contacted.
4. Repeat on a fresh object if the original predates a configuration, device or resource change.
5. Validate the expected next operation, not just initial open or object creation.

Reading the next state

Actions that obscure the cause

• assuming localhost, short names and private IP ranges are classified identically.

Technical references

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