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UCEERR_UNCHANGABLE_UPDATE_ATTEMPTED
UCEERR_UNCHANGABLE_UPDATE_ATTEMPTED is a Windows User Composition Engine (UCE) HRESULT. It indicates that the operation tried to modify a composition resource whose current state or type does not allow updates.
What to check for UCEERR_UNCHANGABLE_UPDATE_ATTEMPTED
- Check the lifetime and immutability rules for the visual or resource being changed.
- Create a new resource when the API requires replacement instead of mutation.
- Ensure that an update is not racing with resource finalization or channel teardown.
Microsoft guidance for WPF render-thread failures
Diagnostic interpretation
This result has the HRESULT value 0x8898040E. 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 / unchangable / update / attempted operation.
- Reproduce this result with the smallest valid input and note whether the result changes with identity, architecture, service state, or target object.
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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