[SR-Users] drouting / do_routing / prefix unknown

Hello I am using Kamailio 5.0.2, with module drouting to do prefix based routing. 1. When I call do_routing and the prefix is not known, the r-uri remains unchanged. Is there a way to detect that the prefix is unknown, other than r-uri remains unchanged ? 2. I have the following parameters modparam("drouting", "db_url",DBURL) modparam("drouting", "sort_order", 0) modparam("drouting", "use_domain", 0) modparam("drouting", "force_dns", 1) # modparam("drouting", "enable_keepalive", 1) If I enable keep alive, I get the following error: Jun 20 22:37:17 kamailio1 kamailio: ERROR: <core> [core/modparam.c:141]: set_mod_param_regex(): parameter <enable_keepalive> of type <2> not found in module <drouting> yet, the documentation leads me to think that it should work: *NOTE: this option is only compatible with <em>sort_order</em> 0 currently. With sort_order value of 1 or 2, destinations status will simply be ignored.* Thanks for your help J.