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WPN_E_TAG_SIZE
WPN_E_TAG_SIZE is an HRESULT used by the Windows notification platform. It means that the tag used to identify or update a notification is longer than the platform permits.
What to check for WPN_E_TAG_SIZE
- Use a compact stable identifier rather than a full URL, serialized object, or display text.
- Apply a documented mapping from application IDs to notification tags.
- Preserve uniqueness after shortening the value and avoid lossy truncation collisions.
Diagnostic discriminator: Measure the tag length passed to the notification API. This result is specifically the tag-size limit and should be distinguished from invalid tag characters.
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