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TAPI_E_INVALMESSAGEID
What TAPI_E_INVALMESSAGEID means
TAPI_E_INVALMESSAGEID A telephony event or provider callback supplied a message identifier that is not valid for the current event contract.
What to check
- Record the message ID, event interface, provider version, and object that delivered it.
- Check whether the ID belongs to a different TAPI version, provider-private range, or stale callback interface.
- Verify marshalling and integer-width conversions in wrappers that translate events.
Handling
Reject or route unknown message IDs explicitly and update the provider/wrapper contract if a supported new message is missing from the application’s mapping.
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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