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UCEERR_MEMORYFAILURE
UCEERR_MEMORYFAILURE is a Windows User Composition Engine (UCE) HRESULT. It indicates that the rendering or composition operation failed because the engine could not obtain needed memory.
What to check for UCEERR_MEMORYFAILURE
- Check process memory usage, virtual-address pressure, and graphics-resource growth before the failure.
- Release large images, visual caches, and unmanaged resources that are no longer required.
- Use a memory dump or profiler to distinguish a leak from a short-lived allocation spike.
Microsoft guidance for WPF render-thread failures
Diagnostic interpretation
This result has the HRESULT value 0x8898040A. 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 / memoryfailure 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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