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TAPI_E_NOEVENT
What TAPI_E_NOEVENT means
TAPI_E_NOEVENT The media service provider event queue currently contains no event to retrieve.
What to check
- Determine whether the caller is polling or expected a specific asynchronous event.
- Check event registration and whether another consumer already removed the event.
- Correlate the empty queue with the request that was expected to produce an event.
Handling
For polling loops, treat the empty queue as a normal state and wait for notification. If an event was expected, diagnose registration and producer completion rather than spinning on the queue.
References
- Microsoft: TAPI_E constants — official Microsoft documentation used to interpret the HRESULT.
- Microsoft: TAPI 3.1 Reference
- Microsoft: Telephony API interfaces
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