o sub o50 if [EXISTS[#]] (abort,WHOA! foo405 visible in rm407: foo405=#) o50 endif o70 if [EXISTS[#]] (abort,WHOA! foo406 visible in rm407: foo406=#) o70 endif o100 if [# NE 42] (abort,rm407: foo407=#) o100 endif ; bump by 1 and check in epilog wether change is visible # = [# + 1] o endsub m2 %