"Apply to files" Chain doesn't work [SOLVED]

I set a chain for Changing Pitch.
It works when I use “Apply to current project”,
but it doesn’t work when I use “Apply to files”.

I did see all files in the processing list, but the effect didn’t apply.

Any idea why?

Did you add an Export command at the end of the Chain? See: http://manual.audacityteam.org/o/man/edit_chains.html .


That’s why!!!
Thanks so much!!!