
pstops: bad page specification:

  PAGESPECS = [MODULO:]SPECS
  SPECS     = SPEC[+SPECS|,SPECS]
  SPEC      = [-]PAGENO[TRANSFORM...][@SCALE][(XOFF,YOFF)]
  TRANSFORM = L|R|U|H|V
              MODULO > 0; 0 <= PAGENO < MODULO
