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TAPI_E_INVALCOUNTRYCODE
What TAPI_E_INVALCOUNTRYCODE means
TAPI_E_INVALCOUNTRYCODE The country code supplied to dialing or translation is not valid for the active TAPI location configuration.
What to check
- Capture the numeric/string country code after application normalization.
- Compare it with the country/region data installed for the current dialing location.
- Check whether configuration was copied from another locale or built from an incomplete international number.
Handling
Use a valid country code associated with the current location and rerun number translation before placing the call.
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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