Emre, the manual describes the format fairly extensively.  

You cannot read c-style individuals into ECJ.  Not only must it be a lisp style, but a very specific lisp style.

Sean

On Feb 24, 2014, at 5:04 AM, Emre AYDO&#286;AN <[log in to unmask]> wrote:

> Hi, I want to read individuals from file for subpopulation. what is the format of 
> individuals in the subpopulations file? because when we write the output of the 
> tree we can describe it in params file like this "gp.tree.print-style = c". Is there 
> any option like this for reading individuals from file? or the format of the input 
> just must be lisp-style.
> 
> Thanks.