Hello, just a bit and my initial guess seem to apply -- adding branches in branch failure route is like adding a new branch to the parallel forking step of that branch, is not creating a serial forking. The solution that I mentioned with script ops using flags or x/avps should work. Also you can try to play with:   * https://kamailio.org/docs/modules/devel/modules/tm.html#tm.f.t_drop_replies Maybe this function just works as it is or it can be extended to drop only the current reply for that branch failure route, might be just a bit of a C code. Cheers, Daniel On 31.08.18 12:25, Marco Capetta wrote: -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference -- www.kamailioworld.com Kamailio Advanced Training, Nov 12-14, 2018, in Berlin -- www.asipto.com