error: no such method or property `empty'

Hi @BassyKuo and everyone, thanks for the sharing.

I used Octave instead of MatLab.
I got a problem when I run evaluation process.

It said:
**error: no such method or property `empty'
...
...**

I traced the error and found that the method 'empty' is called twice in 'Net.m'.

Could anyone help me with this problem, please?

Thank you so much for your attention!