Hi, I have configured kamailio as Ims server with pcscf,icscf,scsf and hss in 4 different vms . After that I use zoiper client for testing the call flow . Registration is successful .It goes via  UE -> Pcscf -> icscf -> scscf and returns back with 200 OK . Registration is happening with authentication from hss . When I make an INVITE , it goes from  UE -> PCSCF -> SCSCF -> ICSCF -> SCSF and s-cscf gives *403 - Domain not served *to icscf and i-cscf returns to p-cscf with the same error . I am not seeing any errors in scscf and i-cscf . In pcscf , I am seeing an error like  *Error : <core> [core/lvalue.c] :lval_pvar_assign() : setting pvar failed * *Error : <core> [core/lvalue.c] : * *lval_assign():assignment failed at pos* What should I do? Kindly advise. I am struggling with this issue for a week.kindly do the needful. Version - kamailio - 5.3.3  I need a normal call flow to be established between two clients.kindly help . _______________________________________________ Kamailio (SER) - Development Mailing List sr-dev(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-dev