| Previous | Next |
| TAPI_E_INVALIDTERMINALCLASS | TAPI_E_MAXSTREAMS |
TAPI_E_NODRIVER
What TAPI_E_NODRIVER means
TAPI_E_NODRIVER The telephony service provider that should handle the operation is no longer available.
What to check
- Confirm that the expected TSP/MSP is installed and loaded by the Telephony service.
- Check recent driver/provider updates, removals, crashes, or service restarts.
- Verify architecture and provider registration when a 32-bit and 64-bit application behave differently.
Handling
Repair or reinstall the intended service provider through its supported installer, then re-enumerate TAPI objects. Do not copy provider DLLs manually.
References
- Microsoft: TAPI_E constants — official Microsoft documentation used to interpret the HRESULT.
- Microsoft: TAPI 3.1 Reference
- Microsoft: Telephony API interfaces
Looking for a different code? Search another status or error code.