Hi, I've been testing with Userdata Qos update functions for Domain Participant.. A DDSSubscriptionBuiltinTopicDataDataReader is created to receive information for remote Domain Participants.. When first discovered, the listener(set to DDS_DATA_AVAILABLE_STATUS) for the builtin reader will be called back and print user data qos for a discoverd remote participant. However, when a remote partipant set a new user data qos, the listener for the builtin reader will not be called back again. (I'm sure the listener is still working). Is that a bug or do I set the qos in the wrong way? How can I get the newly upaded user data qos for a discoverd participant? Thanks!