I'm using neat-python inside of the program Houdini. I am trying to train biped movements. The program runs great until at a random generation usually between 4 and 100 where the the organisms stop reproducing. I tracked the problem down to the species members list suddenly being empty, because the reproduce function stops at the assert line in this code in genome.py:

` def get_new_node_key(self, node_dict):

    if self.node_indexer is None:

        self.node_indexer = count(max(list(iterkeys(node_dict))) + 1)

    new_id = next(self.node_indexer)

    assert new_id not in node_dict

    return new_id`

Anyone know whats causing this?