Why Python program for MultiNEAT causes the undefined symbol error?

Question

I'm trying to execute retina_experiment.py program from Hands-on-Neuroevolution-with-Python book using conda and MultiNEAT. The working envirnoment (rt_multineat) setup is the following:

conda create --name rt_multineat python=3.5 boost=1.67 matplotlib=2.2 numpy=1.11 opencv=3.3
conda activate rt_multineat
conda install -c conda-forge multineat
conda install -c anaconda seaborn
conda install graphviz
conda install python-graphviz

Then I tried to execute the program and got the ImportError (undefined symbol):

python retina_experiment.py -t 1 -g 1000
Traceback (most recent call last):
  File "retina_experiment.py", line 19, in <module> 
    import MultiNEAT as NEAT    
  File "/home/user/anaconda3/envs/rt_multineat/lib/python3.5/site-packages/MultiNEAT/__init__.py", line 3, in <module>  
    from ._MultiNEAT import *    
ImportError: /home/user/anaconda3/envs/rt_multineat/lib/python3.5/site-packages/MultiNEAT/_MultiNEAT.cpython-35m-x86_64-linux-gnu.so: undefined symbol: _ZN5boost7archive18text_oarchive_implINS0_13text_oarchiveEE4saveERKSs

What could possibly cause the undefined symbol error and is it possible to fix it?

I also tried to create the enviroment with parameter python=3.6 instead of python=3.5 with the same result.

are you sure the library name is MULTINEAT and not multineat? — itprorh66, Dec 29 '22 at 13:48
Looking at example code, they seem to utilize ```import MultiNEAT as NEAT``` — itprorh66, Dec 29 '22 at 13:50

score 0 · Answer 1 · answered Jan 02 '23 at 14:40

0

Install all the packages from Conda Forge. Mixing channels is the primary cause of missing symbol references.

answered Jan 02 '23 at 14:40

merv

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Why Python program for MultiNEAT causes the undefined symbol error?

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