W:isotope calculations



i am running cbs-4 calculations on small deuterated organics and
 can not get gaussian to rerun for heavier isotopes. does gaussian
 require a blank line at the input end? any suggestion
 as how to edit the input below would be appreciated. thanks
 kono
 %chk=formaldehyde
  cbs-4m
 formaldehyde
 0 1
  c
  o   1 oc2
  h   1 hc3        2 hco3
  h   1 hc4        2 hco4         3 dih4
 oc2         1.450000
 hc3         1.089000
 hco3        109.471
 hc4         1.089000
 hco4        109.471
 dih4        120.000
 --link1--
 %chk=formaldehyde
  cbs-4m
 0 1
 298.16 0.0 0.0
 12
 16
 2
 2