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UCEERR_OUTOFHANDLES
UCEERR_OUTOFHANDLES is a Windows User Composition Engine (UCE) HRESULT. It indicates that the engine cannot assign another internal handle for a composition resource.
What to check for UCEERR_OUTOFHANDLES
- Check for rapidly created visuals, images, effects, or other resources that are not released when no longer needed.
- Avoid retaining stale visual trees, render targets, or event handlers after views are closed.
- Profile managed and unmanaged resource counts during a long-running reproduction.
Microsoft guidance for WPF render-thread failures
Diagnostic interpretation
This result has the HRESULT value 0x8898040D. AllStat records the condition as “it”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the uceerr / outofhandles operation.
- check the documented return contract of the specific API because the same HRESULT can require different recovery in different interfaces.
Retry and recovery
Retry this result only when the owning API documents a transient state or after the condition described as “it” has changed.
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