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UCEERR_ILLEGALRECORDTYPE
UCEERR_ILLEGALRECORDTYPE is a Windows User Composition Engine (UCE) HRESULT. It indicates that a parsed composition packet contains a record type that is not valid for the active engine or packet structure.
What to check for UCEERR_ILLEGALRECORDTYPE
- Check runtime and component versions for an unsupported or inconsistent composition protocol.
- Investigate unsafe interop and memory corruption before treating this as an application-level rendering error.
- Preserve the exception stack, Windows build, and installed graphics driver information for diagnosis.
Microsoft guidance for WPF render-thread failures
Diagnostic interpretation
This result has the HRESULT value 0x8898040C. 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 / illegalrecordtype operation.
- compare the failing machine with a working one at the same configuration boundary: component version, policy, registration, identity, and target resource.
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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