Hello, if you run release 3.0.0 then you should update at least to latest in its series 3.0.x. But I strongly recommend to go for a newer release, the best is 4.0.x, or at least 3.3.x. Anyhow, always upgrade in the releases series, so whenever you run x.y.z, be sure that you have the highest .z version, because a change only of z number means a release with fixes for x.y. Overall, 3.0.0 is really old to remember if there were any issues -- note that was the first version of kamailio+ser code together, and we had to tune it in following 3.0.x versions to be compatible with what everyone expected from kamailio or ser. Cheers, Daniel On 7/29/13 10:52 PM, LAA wrote: Hello Daniel, I think that debugger module was released with Kamailio version 3.1.0. wasn't it? As I'm running Kamailio 3.0.0, I have set up debug=9. Here you have my config file, the raw capture of the call and the lines in kamailio log file. I see some messages regarding cpl-c module, and I was experiencing some problems with it too. I tested without cpl-c module and I get the same trace but no messages in log file. Thanks in advance. Regards. Luis. https://www.dropbox.com/s/t79ic02b6h85ppj/onbusy_DCM_txt https://www.dropbox.com/s/20c5pqilocey052/kamailio.cfg LOG ******************* ul 28 23:24:43 kamailio /usr/local/sbin/kamailio[1618] : : tm [t_hooks.c:211]: BUG:tm:register_tmcb: no transaction found Jul 28 23:24:43 kamailio /usr/local/sbin/kamailio[1618]: ERROR: cpl-c [cpl_proxy.h:482]: failed to register TMCB_RESPONSE_OUT callback Jul 28 23:24:43 kamailio /usr/local/sbin/kamailio[1618]: ERROR: cpl-c [cpl_run.c:1040]: runtime error Jul 28 23:24:43 kamailio /usr/local/sbin/kamailio[1618]: ERROR: tm [tm.c:1168]: ERROR: t_reply: cannot send a t_reply to a message for which no T-state has been established -- Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda