[SR-Users] jansson_get_filed with variables

Hi all, I will try to do an special condfiguration to manage calls. We ask to Webservice and I obtain a json structure with and array inside.  {allow=true, number=sip:205, ip=127.26.101.12, port=5080, headers=[X- header1, X-header2, X-header3], X-header1=2, X-header2=1, X- header3=yes} This is made like that to add any header and process in an INVITE to add headers. My problems is when I try to process array. I have next code: jansson_get_field("$avp(respINV)", "Allow", "$var(allow)");     jansson_get_field("$avp(respINV)", "Number", "$var(number)");     jansson_get_field("$avp(respINV)", "Ip", "$var(ip)");     jansson_get_field("$avp(respINV)", "port", "$var(port)");     jansson_get_field("$avp(respINV)", "headers", "$var(headers)");     $var(indice)=0;     $var(cabeceras)="{\"cabeceras\":$var(headers)}";     jansson_array_size("cabeceras", $var(cabeceras), "$var(size)");     xlog("L_INFO", "Tamaño: $var(size)----\n");     while($var(indice) < $var(size))     {         jansson_get("cabeceras[$var(indice)]",$var(cabeceras), "$var(tmp)");         xlog("L_INFO", "Cabecera cabeceras[$var(indice)]: --$var(tmp) --\n");         $var(indice) = $var(indice) + 1;         jannson_get_field("$avp(respINV)", $var(tmp), "$var(valorCabecera)");         xlog("L_INFO", "Cabecera: $var(tmp) - Valor: $var(valorCabecera) \n");     }The problem is in the line: jannson_get_field("$avp(respINV)", $var(tmp), "$var(valorCabecera)"); It's appears that I can't use variable in second parameter ERROR: <core> [cfg.y:3228]: yyparse(): cfg. parser: failed to find command jannson_get_field (params 3)                                                        Sep 21 11:36:58 kam01 kamailio: : <core> [cfg.y:3368]: yyerror_at(): parse error in config file /usr/local/etc/kamailio/kamailio.cfg, line 617, column 69: unknown command, missing loadmodule? Any one can confirm that I can't use var as parameters in jannson_get_filed function? Best regards, Sergio