Hi Saikat,

 First, you must have a single PAO.Basis block, namely, all species must
 fit in there.
 Second, just paste that single block into your *.fdf data file, it is
 safer than reading from outside.
 Good luck,

 Roberto



On Fri, 2 Nov 2012, [email protected] wrote:

Dear Roberto
Thanks for your reply.
Yea,I have optimized the structure before. The basis.fdf contains the
following parameter, that I have taken from siesta documentation.
%block PAO.Basis
C     3      0.01
n=2    0    2   E     69.86      4.68
  6.004   4.195
  1.000   1.000
n=2    1    2   E     18.95      3.78
  4.995   3.100
  1.000   1.000
n=3    2    1   E     16.84      0.05
  4.187
  1.000
%endblock PAO.Basis
%block PAO.Basis
H     2      0.22
n=1    0    2   E      2.07      0.00
  4.971   1.771
  1.000   1.000
n=2    1    1   E      0.89      0.01
  4.988
  1.000
%endblock PAO.Basis

------------------------------------------------------
Please suggest me for this deviation.

Regards
Saikat Paik

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