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WPN_E_GROUP_ALPHANUMERIC
WPN_E_GROUP_ALPHANUMERIC is an HRESULT used by the Windows notification platform. It means that the group identifier does not meet the platform character requirements.
What to check for WPN_E_GROUP_ALPHANUMERIC
- Generate group identifiers from a safe allowed alphabet.
- Map external keys to compliant identifiers instead of passing arbitrary user-provided text.
- Perform validation before scheduling or posting the notification.
Diagnostic interpretation
This result has the HRESULT value 0x803E020A. AllStat records the condition as “The notification group is not alphanumeric.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the wpn / group / alphanumeric 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
For WPN_E_GROUP_ALPHANUMERIC, recovery should change one confirmed condition at a time. The verification run should use equivalent inputs and prove that the same boundary no longer rejects the operation.
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