Hi, After running next_gw(), I can see that the ruri is being modified with the gateway ip as the domain. However, when doing a t_relay, I am getting the following error. From ngrep, I don't see any going package to the gateway ip address, so I am suspecting that the error is internal. before relay ruri = sip:86143455048@64.231.23.234:5060;transport=tcp starting to relay May 29 21:18:04 [12107] ERROR:tm:update_uac_dst: failed to fwd to af 2, proto 2 (no corresponding listening socket) May 29 21:18:04 [12107] ERROR:tm:t_forward_nonack: failure to add branches Could someone tell me what could be the problem? Thenks in advance for all your help. Regards, Pete