When I call pjsip_tcp_transport_start2 again like this: status = pjsip_tcp_transport_start2(endpt, &local_addr, &a_name, 1, &tcp); I got : status = 171002, which means : [Object with the same type exists (PJSIP_ETYPEEXISTS)] I am trying to register to the same server with 2 different account in a same application. What should I do to make that work? Share the same transport? 2 different endpt? Or PJSIP just does not support that? -- look to the things around you,the immediate world around you, if you are alive,it will mean something to you ??Paul Strand -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090519/a964a684/attachment.html>