Hi everybody, What exactly has to be done in the on_state_changed() callback for the "PJSIP_INV_STATE_DISCONNECTED" state ? My start point is the "simple_pjsua.c" sample, split in init / makeCall parts. Works fine until I try to made a second call. The second call ends with PJ_ASSERT_RETURN(!udp->attached, PJ_EINVALIDOP) in transport_attach(). Have I to add some closing actions, like pjmedia_session_destroy() ? Which is the media state by PJSIP_INV_STATE_DISCONNECTED ? Thank you for tips and overview ! Best regards David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090529/f2afc300/attachment-0001.html>