<p>In <a href="https://github.com/mlpack/mlpack/pull/686#discussion_r70663129">src/mlpack/methods/ne/neat.hpp</a>:</p>
<pre style='color:#555'>&gt; +    // Reassign genome IDs.
&gt; +    aPopulation.ReassignGenomeId();
&gt; +  }
&gt; +
&gt; +  // Evaluate genomes in population, set genomes&#39; fitness.
&gt; +  void Evaluate() {
&gt; +    for (ssize_t i=0; i&lt;aPopulation.aSpecies.size(); ++i) {
&gt; +      for (ssize_t j=0; j&lt;aPopulation.aSpecies[i].aGenomes.size(); ++j) {
&gt; +        ////printf(&quot;start eval fitness\n&quot;);
&gt; +        double fitness = aTask.EvalFitness(aPopulation.aSpecies[i].aGenomes[j]);
&gt; +       ////printf(&quot;end eval fitness\n&quot;);
&gt; +        aPopulation.aSpecies[i].aGenomes[j].Fitness(fitness);
&gt; +      }
&gt; +
&gt; +      double oldSpeciesBestFitness = aPopulation.aSpecies[i].BestFitness();
&gt; +      aPopulation.aSpecies[i].SetBestFitnessAndGenome();
</pre>
<p>So, maybe I should wait before you updated the code, before moving forward?</p>

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