Rotor position NaN

Hello all, I am using a rotor-ez with a Kenwood ts-590s, the rotor works with RigPi if I manually enter the number in ° I want it to turn but rigpi does not know what heading the rotor is pointing. I know this was talked about before but have not seen a fix for it or know if additional testing has been done. Any help greatly appreciated. 

73 Chuck KB1JFQ