The error i am facing in kamailio pcscf

Apr  9 13:44:31 tel-VirtualBox kamailio[2847]: INFO: rr [rr_mod.c:515]: pv_get_route_uri_f(): No route header present.
Apr  9 13:44:31 tel-VirtualBox kamailio[2811]: ERROR: <core> [core/lvalue.c:353]: lval_pvar_assign(): setting pvar failed
Apr  9 13:44:31 tel-VirtualBox kamailio[2811]: ERROR: <core> [core/lvalue.c:404]: lval_assign(): assignment failed at pos: (106,30-106,48)
Apr  9 13:44:31 tel-VirtualBox kamailio[2811]: ERROR: <core> [core/lvalue.c:353]: lval_pvar_assign(): setting pvar failed

kindly help me in this issue .. because of this , it is throwing 403 domain not server error in scscf