Genetic Algorithm functions unrecognized

I have this code for a knaspack problem and the function of selection causes me an error. I dont know why.

Answer 1

[Walter Roberson]

After line 201

    nueva2=nueva1;

there should be an end statement before the next line

  function [nueva]= selection(poblacioninicial,fitvalue)

and there should be one fewer end statements at the bottom of the file.