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TAPI_E_NOREQUESTRECIPIENT
What TAPI_E_NOREQUESTRECIPIENT means
TAPI_E_NOREQUESTRECIPIENT No registered program is available to receive the Assisted Telephony request.
What to check
- Enumerate or inspect the registered request recipients for the requested media or operation.
- Verify that the intended application is installed and registered in the same user/session context.
- Check whether registration was removed during upgrade, repair, or per-user profile changes.
Handling
Register an appropriate request recipient or route the operation through an application that is already registered. Repeating the request without a recipient cannot succeed.
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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