Hey all,

I've got two layers of Kamailio proxies running. One set of edge proxies that are parking outbound connections and doing load balancing to a set of registrar/proxies. This is working well with one exception:

I can't seem to get t_load_contacts/t_next_contacts working correctly for handling multiple outbound connections. It appears to work (though I haven't extensively tested) whenever there's more than one registration binding for an AOR. However, when there's only one, I get:

 8(27) DEBUG: tm [t_serial.c:191]: t_load_contacts(): nr_branches is 0
 8(27) DEBUG: tm [t_serial.c:194]: t_load_contacts(): nothing to do - only one contact!
 8(27) DEBUG: tm [t_serial.c:455]: t_next_contacts(): no contacts in contacts_avp - we are done!
 8(27) ERROR: <script>: t_next_contacts() failed

I tried omitting the call to t_next_contacts(), thinking it should possibly only be used in failure_route. But when I do that (while leaving t_load_contacts), I get:

 5(24) ERROR: tm [t_fwd.c:1730]: t_forward_nonack(): ERROR: t_forward_nonack: no branches for forwarding
 5(24) WARNING: <core> [receive.c:258]: receive_msg(): error while trying script

The relevant part of the config is:

  if (!lookup("location")) {
    $var(rc) = $rc;
    switch ($var(rc)) {
      case -1:
        xlog("L_INFO", "$ci|log|lookup of contacts for $ru returned no results\r\n");
        send_reply("404", "Not Found");
        exit;
      case -3:
        xlog("L_INFO", "$ci|log|lookup of contacts for $ru failed with code $var(rc)\r\n");
        send_reply("404", "Not Found");
        exit;
      case -2:
        send_reply("405", "Method Not Allowed");
        exit;
    }
  }

  if (!t_load_contacts() || !t_next_contacts()) {
    xlog("L_ERR", "t_load_contacts() failed\n");
    sl_reply_error();
    t_release();
    exit;
  }

Am I missing something else here? Note: it works fine if I remove t_load_contacts/t_next_contacts, but then I don't get proper handling of multiple sip.instance bindings/differing q values.

Best,
Colin