Dear siesta users
      I am trying to calculate the optical properties of graphene. 
I have the .EPSIMG file and i want  to calculate different optical properties 
out of it.
I used the command input < System label.EPSIMG but  siesta gave the following 
message :

"Yagi-Uda antenna analysis programs, version 1.19
Written by Dr. David Kirkby Ph.D. (G8WRB, email:[email protected])

This program asks for length, diameter and position of antenna elements then
writes them to a file you specify. Data is written in m (metres)
 
Numerical Recipes run-time error...
The minimum frequency has been set higher than the centre frequency
...now exiting to system...
Enter any notes on this design (up to 400 characters): Enter a filename to 
write data to Enter the centre frequency in MHz Enter the minimum frequency in 
MHz Enter the maximum frequency in MHz Enter the frequency steps in MHz"

  I can t understand the message and i think it is irrelevant . I will be 
thankful if someone helps me
with regards 
S.Gholami

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