Hello, t_check_trans() is checking if there is a retransmission, not if a request belongs to a dialog. Did you get the same BYE sent twice at more or less same time? Cheers, Daniel On 16.10.18 18:00, José Seabra wrote: Hi all, I noticed that using the module TOPOH with the parameter mask call id enabled and the t_check_trans together isn't working correctly. When i receive the BYE message my script call the function t_check_trans() in order to check if a message belongs or is related to a transaction. This function always returns false when used with the topoh mask call id enabled, once that the BYE belongs to an existing dialog it must return true. In the logs it says something like transaction doesn't match dialog using the RFC3261. If the TOPOH mask call id option is disabled everything works perfectly. Anyone here already faced this behavior? Thanks Regards -- José Seabra _______________________________________________ Kamailio (SER) - Users Mailing Listsr-users@lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla -- www.asipto.comwww.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