Seeing it happens when an ACK was received by trying to dump $T_rpl(...), the docs specify it has to be used in failure route blocks, not being the case in this crash situation: * https://www.kamailio.org/wiki/cookbooks/5.4.x/pseudovariables#t_rpl_pv I added safety checks in the code to catch such cases and return $null. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2479#issuecomment-694195433