[LAU] Ecasound misbehaving?

[Ken Restivo]

This command plays back the first track, but records a blank, empty wav file:

 ecasound -f:f32_le,2,48000  -c -a:1 -i echomadness.wav  -o jack_auto -a:2 -i jack,fretless:left -o fretless.wav -G:jack,recorder,sendrecv -z:multitrack

What might I be doing wrong here?

It used to work, but doesn't anymore, and I can't think of anything I might have changed recently on this system.

-ken