Vector Error Code -1

I have having trouble with my vector calibrating my 935 and edge 520.  I have added new battiers to both pods, switches the pods sides (swapped left and right) and reinstalled Vector software.  Sometimes it gives me an Error code of 2 but most of the time it is -1.  I cannot find the explanation of Error code -1 anywhere.  On my 935 it does say both sides are connected.... just not calibrating.

Maybe it's a left pedal issue?