when trying to add a new interface with json
{
"auth":"dd2ff148338334ef917547f21a25749f",
"method":"host.update",
"id":1,
"params":{
"hostid":10017,
"interfaces":

{ "dns":"", "main":1, "hostid":10017, "useip":1, "type":4, "ip":"127.0.0.1", "port":"8810" }

},
"jsonrpc":"2.0"
}

I'll get an error SON-rpc error generation failed. No such error "".
See atteched log for details
thorko79