This is a known issue with NetBotz 3.3 or higher Botzware or NetBotz firmware. This error will occur when polling the register assigned to the door switch on a camera pod 160 if the door switch is not connected. It will happen when you poll this register or a block of registers that contain this register.
In order to stop getting this error, you will need to stop polling the register from your BMS. The easiest thing to do is to omit this sensor when initially creating the register map or recreating the register map without this sensor.