How to generate *. npf

[HYuhualin]

root@vultr:~/vae-npvc# python3 main.py --model ConvVAE --trainer VAETrainer --architecture architecture-vae-vcc2016.json
Using default logdir: logdir/train/0114-1444-11-2019
Traceback (most recent call last):
File "main.py", line 78, in
main()
File "main.py", line 58, in main
xmax=np.fromfile('./etc/xmax.npf'),
FileNotFoundError: [Errno 2] No such file or directory: './etc/xmax.npf'

Compiler tips can not find the file, can you answer, beginners do not understand