[Users] BUG:tm:run_failure_handlers: stack level is 1!!

[alex4152]

Dear all,
help me please to understand - what it could be mean:
this line appear in openser ( OpenSer (1.0.1) log:
- May 23 21:16:05 sh /usr/local/sbin/openser[11409]:
BUG:tm:run_failure_handlers: stack level is 1!!
after execution this part of my config file:
....


                        if (!((src_ip == 127.0.0.1) && (src_port == 5060))) {
                                  xlog("L_ALERT","    Flow: SER -->
B2B ... \n");
                                rewritehost("127.0.0.1");
        t_on_failure("1");

                                t_relay();
....

also it appear when on_reply section processed

Failure_route[1] look like that:
failure_route[1]
{

                                  xlog("L_ALERT","    \n");
                                  xlog("L_ALERT","Failure_Route[1]:    \n");

        # authentication reply received?
        if ( t_check_status("401") )
        {
                                  xlog("L_ALERT","    Status code:
[401]  [Unauthorized]   \n");

        } ........

Thank you,
Alexey