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UCEERR_TRANSPORTDISCONNECTED
UCEERR_TRANSPORTDISCONNECTED is a Windows User Composition Engine (UCE) HRESULT. It indicates that the rendering channel lost its transport connection while composition work was pending.
What to check for UCEERR_TRANSPORTDISCONNECTED
- Check for render-thread failure, device reset, session change, window destruction, or application shutdown.
- Discard pending work tied to the disconnected channel and recreate resources after the UI context is valid again.
- Capture the first failure in the chain because later transport errors are often secondary.
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