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TAPI_E_INVALIDTERMINALCLASS
The terminal class does not match the provider contract
TAPI_E_INVALIDTERMINALCLASS (0x8004003C) means the class identifier/name supplied when selecting or creating a terminal is not recognized for the current provider/media path.
Evidence to capture
Record requested terminal class, provider, address/stream media type, enumerated terminal classes, and any string/GUID mapping performed by the caller.
Focused correction
Select a terminal class advertised for that provider and media type. If an object of the right class is later invalid or busy, diagnose those separate terminal results.
Technical references
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