LTC2943 Stops monitoring Battery Voltage a Current

Hi:

I am using a LTC2943 in a small project, it is being monitored with a PIC16F18326 MPU.  Everything seemed fine then suddenly it stopped monitoring the battery voltage and current.  Strangely the Coulomb counter seems to keep working.  I created three breakout-boards with LTC2943 chips, they exhibit the same problem.  Is there some programming issue I`ve missed?

Thanks, Tom