Xbee 3 python script fails occasionally with OSError: [Errno 7019] ENODEV

I reformatted the File System with the File System Manager ‘Format’ button with no change.

The python code runs a data collection and transmission loop and on 1 out of every 10-30 loops I get this message-OSError: [Errno 7019] ENODEV.

Any help would be appreciated.

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That generally means that you are not able to send data. Try using the monitor functions.