Hi Benny, Thank you for the quick answer. Now it works fine. I have found another problem with TCP connections: When a pjsip client connects to a pjsip server using TCP and the client get exited, then the TCP connection is shutdowned and destroyed (because of pjsip_endpt_destroy) but the server does only shutdown the pjsip transport, not destroy. After the client is down, the tcp socket in the server application changes to state CLOSE_WAIT and nothing happens. When I shutdown the server (where pjsip_endpt_destroy is called and herewith the transport will be destroyed) then I got logging from pjsip: TCP transport destroyed with reason 130057: Socket is not connected (WSAENOTCONN). I think the problem is in pjsip_transport_shutdown(): The function is described that the transport will be destroyed if no object is using the transport. Debugging this function shows that the reference counter is 0, but I haven't found code in this (and the underlying) function where destroy- functions are called... Best regards, Helmut
