Knob 1 not working on essential 49

[Bswett]

All knobs, sliders and keys are good except for the first knob.
What should I look into first to try and solve this?
Thanks.

[Mike Warren]

If you turn on the MIDI console in the MIDI Control Center do you see data for all controls except the first knob?

If so, I think your unit might be faulty. If you do see data for the first knob, you're likely to have a routing problem in your software.