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WPN_E_NOTIFICATION_SIZE
WPN_E_NOTIFICATION_SIZE is an HRESULT used by the Windows notification platform. It means that the notification payload is larger than the maximum size accepted by the platform.
What to check for WPN_E_NOTIFICATION_SIZE
- Measure the final serialized notification content rather than only the source text or template.
- Remove redundant data and keep the notification focused on the information needed for the alert.
- Place large details behind an app activation or deep link instead of embedding them in the payload.
Diagnostic interpretation
This result has the HRESULT value 0x803E0115. AllStat records the condition as “The size of the notification content is too large.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the wpn / notification / size operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original wpn / notification / size condition.
Retry and recovery
Preserve the failing evidence for WPN_E_NOTIFICATION_SIZE before recovery. After changing the identified cause, repeat the same minimal operation and compare it with the original trace.
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