Monster spawn error

[Tomahawk]

setarray .mvplist[0],1832,1511,1647,1785,1630,1039,1874,2068,1272,1719,1046,1389,1112,1115,1418,1871,1252,1768,1885,1649,1651,1492,1734,1251,1779,1688,1646,1373,1147,1059,1150,1087,1190,1038,1157,1159,1623,1650,1583,1312,1751,1685,1648,1658;
.@mobid = .mvplist[rand(0,getarraysize(.mvplist))];
monster "map_x",0,0,strmobinfo(2,.@mobid),.@mobid,1,"mvpspawn::OnMVPDead";

sometimes gives this error:

 

Can anyone help me? I'm just not getting what i'm doing wrong.

[utofaery]

1 hour ago, Tomahawk said:

setarray .mvplist[0],1832,1511,1647,1785,1630,1039,1874,2068,1272,1719,1046,1389,1112,1115,1418,1871,1252,1768,1885,1649,1651,1492,1734,1251,1779,1688,1646,1373,1147,1059,1150,1087,1190,1038,1157,1159,1623,1650,1583,1312,1751,1685,1648,1658;
.@mobid = .mvplist[rand(0,getarraysize(.mvplist))];
monster "map_x",0,0,strmobinfo(2,.@mobid),.@mobid,1,"mvpspawn::OnMVPDead";

sometimes gives this error:

 

Can anyone help me? I'm just not getting what i'm doing wrong.

.@mobid = .mvplist[rand(getarraysize(.mvplist))];

*monster     "<map name>",<x>,<y>,"<name to show>",<mob id>,<amount>{,"<event label>",<size>,<ai>};

monster "map_x",0,0,--ja--,.@mobid,1,"mvpspawn::OnMVPDead";

    monster "place",60,100,"Poring",1002,1,"NPCNAME::OnLabel";

monster "map_x",0,0,"~I am King~",.@mobid,1,"mvpspawn::OnMVPDead";

Edited February 12, 2019 by utofaery

[AnnieRuru]

most people still confuse about this

rand(2) generate 0,1
rand(0,2) generate 0,1,2

it should be

.@mobid = .mvplist[rand(getarraysize(.mvplist))];

[Tomahawk]

Thank you.