The function or feature is not available in this implementation or on this service provider.
Returned by TDx_Play::GetGroupConnectionSettings() and TDx_Play::SetGroupConnectionSettings() if they are called from a session that is not a lobby session.
Returned by TDx_Play::SendEx() if the priority or time-out is set, and these are not supported by the service provider and TDx_Play protocol is not on.
Returned from TDx_Play::GetMessageQueue() if you check the send queue and this is not supported by the service provider and TDx_Play protocol is not on.