I am trying the new Mango (core 2.1.3 and BACnet 2.0.3) to discover some BACnet/IP points. I use the MAC address as XXX.XXX.XXX.XXX:47808 and Device instance number. But always got the error: java.net.SocketException: Socket is closed. If I manually input the details of points on this BACnet/IP network, it works fine. But I just could not make the discover working. Could you please help me with this problem? Please let me know if you may need more information about our scenario. Thank you!