Environment error

[sustech-lz]

ParetoDiscovery optimizing: generation 2Traceback (most recent call last):
File "/Users/zhengli/Desktop/Code/DGEMO-master/main.py", line 57, in
main()
File "/Users/zhengli/Desktop/Code/DGEMO-master/main.py", line 45, in main
X_next, Y_next = next(solution)
File "/Users/zhengli/Desktop/Code/DGEMO-master/mobo/mobo.py", line 105, in solve
solution = self.solver.solve(surr_problem, X, Y)
File "/Users/zhengli/Desktop/Code/DGEMO-master/mobo/solver/solver.py", line 39, in solve
res = minimize(problem, algo, ('n_gen', self.n_gen))
File "/Users/zhengli/anaconda3/lib/python3.10/site-packages/pymoo/optimize.py", line 65, in minimize
res = algorithm.solve()
File "/Users/zhengli/anaconda3/lib/python3.10/site-packages/pymoo/model/algorithm.py", line 183, in solve
self._solve(self.problem)
File "/Users/zhengli/anaconda3/lib/python3.10/site-packages/pymoo/model/algorithm.py", line 264, in _solve
self.next()
File "/Users/zhengli/anaconda3/lib/python3.10/site-packages/pymoo/model/algorithm.py", line 235, in next
self._next()
File "/Users/zhengli/Desktop/Code/DGEMO-master/mobo/solver/pareto_discovery/pareto_discovery.py", line 463, in _next
p.start()
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/context.py", line 224, in _Popen
return _default_context.get_context().Process._Popen(process_obj)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/context.py", line 288, in _Popen
return Popen(process_obj)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 32, in init
super().init(process_obj)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/popen_fork.py", line 19, in init
self._launch(process_obj)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/popen_spawn_posix.py", line 47, in _launch
reduction.dump(process_obj, fp)
File "/Users/zhengli/anaconda3/lib/python3.10/multiprocessing/reduction.py", line 60, in dump
ForkingPickler(file, protocol).dump(obj)
AttributeError: Can't pickle local object 'GaussianProcess.init..constrained_optimization'

[sustech-lz]

Just to follow up on this, I just wonder if it's caused by an issue with the version of the python environment when install the file.

[yunshengtian]

I believe it could be either a python version or an operating system issue. Are you using windows? I remember pickle with multiprocessing could have some issues depending on how the operating system implements multiprocessing.

[sustech-lz]

Thanks for receiving your reply. Seeing the advantages of the DGEMO algorithm, I really hope to use the DGEMO algorithm you provided in my future work. I have only run it on the MacOS, and then I will install and try it on my server in Linux system. Also, may I ask where you downloaded the pygco package? I did not see any relevant content from the environment.yml you provided.

[yunshengtian]

Does pip install pygco work?

[sustech-lz]

Thank you very much for answering the questions. The pygco installation package has been successfully installed through github. I think the problem causing _K_inv may be caused by not initializing line 65 of gp._K_inv in the gaussian_process.py file, after modifying the code, main.py can run normally on our server.

[sustech-lz]

[CarllMC]

Hi zhengli, I seem to be experiencing the same problem, can you provide a more detailed solution, appreciate it!

[sustech-lz]

Hi CarllMC, perhaps you can refer to these: https://github.com/Borda/pyGCO, https://pypi.org/project/pygco/.

[GL-Aronman]

HI yunshengtian and sustech-lz ,I met the same problem， seems that install pygco acordding to https://github.com/Borda/pyGCO didn't work，Will installing pygco solve the problem?

[sustech-lz]

Hi GL-Aronman, hope this file will help you.
https://drive.google.com/drive/folders/185rwL3DnDn4Uo5CxS_WLbfaoy4gZgmPf?usp=sharing