Help to fix this NO dual script

[Sallycantdance]

hello i already try everything i can to fix this script im always having this error after i enter the map, can someone help me

[Error]: buildin_rid2name: invalid RID
[Error]: buildin_rid2name: invalid RID
[Error]: buildin_getmapxy: Player with nick '(null)' is not found.
[Error]: buildin_getmapxy: Player with map id '0' is not found.

 

Quote

-    script    dualclientkicker    -1,{
OnPCLoadMapEvent:
    set .@charmap$, strcharinfo(3);
    if(!compare(.tmp$, .@charmap$)) end;
    
    set .@len, query_sql("SELECT DISTINCT `account_id` FROM `char` WHERE `account_id` IN (SELECT `account_id` FROM `login` WHERE `last_ip` =(SELECT `last_ip` FROM `login` WHERE `account_id`="+getcharid(3)+")) AND `online` <> 0;", .@a);
    
    // Check for results from query_sql
    if (.@len == 0) end;
    
    for (set .@d, 0; .@d < .@len; set(.@d, .@d+1)) {
        // Ensure the account ID is valid before proceeding
        if (rid2name(.@a[.@d]) != "") {
            if (!getmapxy(.@map$, .@x, .@y, BL_PC, rid2name(.@a[.@d])) && .@charmap$ == .@map$)
                set .@c, .@c + 1;  
        }
    }
    
    if (.@c > .limitacc) {
        dispbottom "Dual accounts not allowed in this map.";
        warp "SavePoint",0,0;
    }    
    end;

OnInit:
    set .limitacc, 1;
    setarray .maps$, "pvp_y_1-2", "prt_pvp", "grandarena", "bombring", "gh10", "gh11", "prtg_cas01";
    set .lens, getarraysize(.maps$);
    
    for (set .a, 0; .a < .lens; set(.a, .a+1)) {
        setmapflag .maps$[.a], mf_loadevent;
        set .tmp$, .tmp$ + .maps$[.a] + ",";
    }
}