hello to everyone !

I am working on Okuma ops300l and i created a user sub programming, base on the user task2 programming book said if local variable defined as here > IF ABC GOTO N1000, which meant if that local variable show up then jump to N1000 if not show up it will read the following line but somehow this OSP 300l control give me an alarm 2227-01 alarm b or local variable a side? if anyone have any clues please help...