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UCEERR_UNSUPPORTEDTRANSPORTVERSION
UCEERR_UNSUPPORTEDTRANSPORTVERSION is a Windows User Composition Engine (UCE) HRESULT. It indicates that the two sides of the composition channel cannot communicate because their transport versions are incompatible.
What to check for UCEERR_UNSUPPORTEDTRANSPORTVERSION
- Check for mismatched runtime components, partial servicing, or unsupported side-by-side deployment.
- Repair or update the affected.NET and Windows components using a consistent supported build.
- Avoid mixing private copies of framework rendering assemblies with the system-installed runtime.
Microsoft guidance for WPF render-thread failures
Diagnostic interpretation
This result has the HRESULT value 0x88980415. 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 / unsupportedtransportversion operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original uceerr / unsupportedtransportversion condition.
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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