Why does inversion always get 'nan' when I input some images?

[sherlhw]

When I input some images, the inversion variable 'inv_latent' is always 'nan', these is my input content image:

the result_rec.jpg is all black.

What is the reason for this?

[mohammadalirezaei]

@sherlhw in renoise_inversion.py check noise_regularization function, in this function you have error.

[eeewhe]

so, any resolution?