Danmakufu Error 1

#TouhouDanmakufu[Single]
#ScriptVersion[3]
#Title["Test"]
#Text["Just another improved 1"]

let bossObj;
let bossX = 0;
let bossY = 0;
let imgBoss = GetCurrentScriptDirectory ~ "Shikiekiki.png";

#include "script/default_system/Default_ShotConst.txt"

@Initialize {
         // define a boss in bossObj and register as
         bossObj = ObjEnemy_Create(OBJ_ENEMY_BOSS);
         ObjEnemy_Regist (bossObj);

         // texture the boss, set centre as true centre.
         ObjPrim_SetTexture(bossObj,imgBoss);
         ObjSprite2D_SetSourceRect(bossObj,0,0,70,100);
         ObjSprite2D_SetDestCenter(bossObj);

         // move boss to desired x y location at desired speed
         ObjMove_SetDestAtSpeed(bossObj,192,120,3);

         mainTask;       //run mainTask
}

@Event {
         // setting the boss timer and life
         alternative(GetEventType())
         case(EV_REQUEST_LIFE) {
                 SetScriptResult(2000);
         }
         case(EV_REQUEST_TIMER) {
                 SetScriptResult(70);
         }
}

@MainLoop {
           bossX=ObjMove_GetX(bossObj);
           bossY=ObjMove_GetY(bossObj);
           yield;
}

@Finalize {

}

//your best friend, forever
function wait(w)   { loop(w) { yield; } }

task mainTask {
        fire;
}

task fire {
       loop{
              CreateShotA1(bossX,bossY,9,90,14,0);
              wait(60);
       }
}