Do you have the scheduled reboot option turned on? If it's a problem with that you should connect the rpi to a keyboard and a monitor and login as fast as you can, then remove the Minera cron job with:
sudo rm /etc/cron.d/minera
This worked for me. The PI stays online now. I sent you a PM.
Another Problem. I connected a Gawminers Warmachine to a new Minera yesterday.
I used a Windows Machine with CGminer before. On the Windows Machine i had a Hashrate of 54 MHs like it should be.
With Minera i only get a 24h average of 42 MHs. Clevermining shows me a Reject Percentage of 15%. Minera shows 8% Error rate and 13% Reject Rate.
I use BFGminer with extra Option -S zus:all --set zus:chips=256
Any Idea what i can do better? Is there a way to get the War Machine running on CGminer? If yes, what extra Options do i have to use?
Cheers
Alex