[SR-Users] subnet match

Hello Everyone, Not sure what I am missing, but can't match ip address to subnet Log says INFO: <script>: Subnets not match processing rtp...destination ip [10.0.1.242] and sourceip [10.0.1.241] if(is_method("INVITE")) { $avp(destip)=$(du{s.select,1,:}); $avp(subnet) = $avp(destip) + "/16"; xlog("L_INFO", "Initial Request: [$rm] destination ip [$avp(destip)] and sourceip [$si]\n"); if(!is_in_subnet("$si", "$avp(subnet)")) { xlog("L_INFO", "Subnets not match processing rtp...destination ip [$avp(subnet)] and source ip [$si]\n"); route(RTP_MANAGE); } } [root@prx00 ~]# rpm -qa | grep kamailio kamailio-mysql-5.1.2-2.git4c840b7e9.fc27.x86_64 kamailio-5.1.2-2.git4c840b7e9.fc27.x86_64 Slava.