Why does this give EOF

[catornot]

//website https://mindcode.herokuapp.com/
ubind(@Zenith)

heal = false
num = 3 / 4

if @unit.health < @unit.maxHealth * num
    heal = true
    if ulocate(building ,repair,false, rx, ry, repair)
        approach(rx, ry, 3)
        print("state: healing")
    else
        ulocate(building ,core,false, cx, cy, icore)
        approach(cx, cy, 20)
    end

    if uradar(enemy,any,any,true,distance) && heal == true
        if distance < 23
            target(, , true)
            print(" + defending,")
        end
    end
end

if heal == false
    if switch1.enabled
        if switch2.enabled
            ulocate(building ,core,false, cx, cy, ecore)
            approach(@thisx, @thisy, 23)
            target(e.x, e.y, true)

        end
    else
        print("state : idle")
        approach(@thisx, @thisy, 10)
        approach(@thisx, @thisy, 11)
        if uradar(enemy,any,any,true,distance)
            if distance < 23
                target(e.x, e.y, true)
                print(" + defending,")
            end
        end
    end
end

[catornot]

I think I got it was the
target(, , true)
which I changed to
target(E.x, E.y , true)

plus the uradar problem makes everything hard.