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TAPI_E_NOTOWNER
What TAPI_E_NOTOWNER means
TAPI_E_NOTOWNER The application does not have OWNER privilege on the call, so an owner-only operation is rejected.
What to check
- Read the application’s current privilege for the call and compare it with the method requirements.
- Check whether another application owns the call or whether the call was opened only for monitoring.
- Verify that a transferred or newly created call did not change ownership expectations.
Handling
Request or obtain OWNER privilege only when the application is intended to control the call. Otherwise restrict the application to monitor-safe operations.
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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