B1:=BACKSET(ISLA STBA R,PE AKBA RS(1,N,2)+1);

B2:=B1 gt;REF(B1,1);

C1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,3)+1);

C2:=C1 gt;REF(C1,1);

A11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,1)+

C11:=BACKSET(ISLASTBA