Please comment out the "set temp1_max_hyst" statement in jc42.conf (which I presume is the failing statement on line 23) and try again. Looking at the jc42 driver, I don't think it exposes an attribute by that name. As far as I can see, there are only 4 limits exposed: temp1_min, temp1_max, temp1_crit and temp1_crit_hyst. sensord only logs min and max apparently, but if you run "sensors" you should see all the limits supported by the hardware. You obviously can't define the value of a limit which doesn't exist in the hardware.