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TAPI_E_NOREQUEST
What TAPI_E_NOREQUEST means
TAPI_E_NOREQUEST There is no pending Assisted Telephony request to return or process.
What to check
- Determine whether the caller is polling for work or expected a previously submitted request to remain queued.
- Check whether another recipient consumed or cancelled the request first.
- Correlate request creation and retrieval timestamps before treating the absence as a failure.
Handling
For polling code, handle the empty queue as an expected state. If a request was expected, investigate its enqueue, cancellation, and recipient selection instead of repeating the same dequeue call blindly.
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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