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WPN_E_OUTSTANDING_CHANNEL_REQUEST
WPN_E_OUTSTANDING_CHANNEL_REQUEST is an HRESULT used by the Windows notification platform. It means that another request for a notification channel is still pending for the same application identifier.
What to check for WPN_E_OUTSTANDING_CHANNEL_REQUEST
- Await or share the in-flight request instead of initiating a duplicate channel request.
- Serialize channel refresh logic across startup, background activation, and user-sign-in paths.
- Persist and reuse an unexpired channel where the API and application design permit it.
Diagnostic interpretation
This result has the HRESULT value 0x803E0103. AllStat records the condition as “A notification channel request for the provided application identifier is in progress.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the wpn / outstanding / channel / request 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
” has changed.
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