Comment # 18 on bug 1231228 from James Moe

> 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.

Yes, that was the failing statement.
And using only those options you mentioned changes the settings.

Settings:
    label "temp1" "DIMM Temp"
    set temp1_min     -10
    set temp1_max      65
    set temp1_crit     90
    set temp1_crit_hyst 84

produces:
jc42-i2c-6-1b
Adapter: SMBus PIIX4 adapter port 0 at 0b00
DIMM Temp:    +39.8°C  (low  = -10.0°C)
                       (high = +65.0°C, hyst = +59.0°C)
                       (crit = +90.0°C, hyst = +84.0°C)