[SilentSoul]

Could you post your script? I can't understand your problem , If you're trying to use sscanf for params syntax you should use

pawn Код:

CMD:test(playerid, params[])
{
    new id;
    if(sscanf(params, "d",id)) return SendClientMessage(playerid, -1, "Syntax :/test [playerid]");
    SendClientMessage(id,-1,"Your id is working fine!");
    return 1;
}