RuntimeError: Json parsing error

[666github100]

I encountered a very strange thing. The first time I reproduced the code, I did not encounter this error, but the second time, I encountered:
Traceback (most recent call last):
File "/home/user/.conda/envs/traffic/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/home/user/.conda/envs/traffic/lib/python3.6/multiprocessing/process.py", line 93, in run
self._target(*self._args, **self._kwargs)
File "/data1/user/colight/pipeline.py", line 189, in generator_wrapper
best_round=best_round
File "/data1/user/colight/generator.py", line 31, in init
self.env.reset()
File "/data1/user/colight/anon_env.py", line 822, in reset
self.eng = engine.Engine(new_path, thread_num=1)
RuntimeError: Json parsing error

I feel very puzzled. I have looked at the homepage of cityflow ,and the configuration file for cityflow.Engine() should be right. Why does it indicate 'RuntimeError: Json parsing error'? Does any friend help me ?I would appreciate it !

[zhc134]

can you check the the value of "new_path" and check if the json file is valid or not?

[666github100]

thanks very much, in the code,new_path=os.path.join(self.path_to_work_directory,"cityflow.config"),it is a file,and I checked the directory is right ,and I have already checked that the json file is valid.So do you know why I encountered the question?(the code is recommended to run under docker,but I don't use docker,is this the original cause?)I would appreciate it if you could help me!

[zhc134]

The issue shouldn't be related to Docker. For now, the only reason I can think of is the presence of some format disruption or unexpected fields in the JSON configuration file.