Experimenting janssonrpc-c, I noticed that I can't get anythin in the result variable, if no "route" option is specified. 1/ With "route" option, everything is OK: janssonrpc_request("local", "bar.PIC1", '{"cli": "$avp(cli)","en": "$avp(cld)"}', "route=RPC_Init_Resp,retry=1"); route[RPC_Init_Resp] { xlog("JANSSON result: $var(result)\n"); The "xlog" returns the json formatted results as expected: JANSSON result: {"result":{"NetScenario":"PreCall","cli":"123456789","en":"9876543210Destination":"sip:xxx@xx.x.xx.xxx:xxxx","NextRPC":"bar.PIC2"}} 2/ The exact same request, without the route option does not return anything: janssonrpc_request("local", "bar.PIC1", '{"cli": "$avp(cli)","en": "$avp(cld)"}'); xlog("JANSSON result: $var(result)\n"); The "xlog" returns 0 this time: JANSSON result: 0 A tshark trace indicates the same response is returned by the jsonrpc server, excluding a potential issue on this side. I am available for futher information Best regards, Laurent. --- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/256