First time this ever happens!
I switched the Profiler on today and started working. Then I realized that the volume pedal did not respond at all. Connections seemed to be ok.
Went to the related System page, the calibration meter responded to the pedal swinging. Type 1, function Volume. But no volume swelling.
Started tweaking and checking. Set the function to wah... and here comes the volume function back
I did not touch anything after my last session, where everything was working as expected.
Of course the rig has got no wah, not even a deactivated one.
As a side note, the position at which I leave the pedal when in Wah mode (where it's working as a volume) defines and sets the volume when I switch to Volume mode: if there's no volume, the rig will stay muted and the other way around.