OPTION,-ECHO,-TRACE,-DEBUG,-INTER,INFO,WARN; CALL,"vepp4.mad"; USE,RING2; SELECT,FULL; BEAM,PARTICLE=ELECTORN,ENERGY=1.8; TWISS,SAVE=TWISS,TUNES=TTNS; PLOT,TABLE=TWISS,FILENAME="chrom",HAXIS=S,VAXIS1=BETX,BETY,VAXIS2=DX; HARMON; HCHROMATICITY; ENDHARM; STOP;