| Previous | Next |
| UCEERR_ILLEGALHANDLE | UCEERR_RENDERTHREADFAILURE |
UCEERR_HANDLELOOKUPFAILED
UCEERR_HANDLELOOKUPFAILED is a Windows User Composition Engine (UCE) HRESULT. It indicates that a composition command refers to a resource that is no longer registered in the active composition channel.
What to check
- Check for use-after-dispose patterns and callbacks that run after a window or visual is closed.
- Ensure that resources are created, updated, and released on the correct dispatcher and in valid order.
- Capture earlier rendering errors because the missing resource can be a consequence of an earlier channel failure.
Microsoft guidance for WPF render-thread failures
Looking for a different code? Search another status or error code.