[SR-Users] Is t_on_failure with uac_req_send possible?

[Nathan Angelacos]

I'm trying to arm the failure route for a message sent via uac_req_send 
- similar to:

{
$uac_req(method)="OPTIONS";
$uac_req(ruri)="sip:kamailio.org";
$uac_req(furi)="sip:kamailio.org";
$uac_req(turi)="sip:kamailio.org";

t_on_failure("UAC_FAIL");
uac_req_send();
}

failure_route("UAC_FAIL") {
   xlog ......
}



If there is no response from the remote server, kamailio resends until 
the timers expire; but the failure route is not run.  Similarly, if a 
404 is sent back from the remote server, the failure route is not run.

Am I missing something obvious?

Thanks