Answer
The RM126x P2P mode uses a beacon at the start of a frame to synchronise the devices in the network. Device 0 is always the device that generates the beacon and all other devices listen for the beacon. In a device other than device 0 fails to receive the beacon then it will return the Class: [Fail] error message.
Commons reasons for seeing this error might include
- Device 0 has not joined the network
- Device 0 is out of range of the device seeing the error
- The network has been incorrectly configured, for example more than the defined number of devices on the network