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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 discriminator: Validate the group identifier itself against the platform character rules. If changing only the group string clears the result, package registration and cloud connectivity are not the failing layer.
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