It happens sometimes, after long run.
And I think it can be connected to sudden crush when mining on fee.server,
it happens to me once.

This error I saw few times already.

miniZ,
I also had the miner crash once last night.  I'm glad I had asked for that runtime/local time modification because that made it very simple to spot it and then find it in the log.  You can see that it was on the dev fee and then the miner started up again (I have it in a loop in the bat file).  I am guessing no errors were written to the log because the miner just crashed.   Thanks again for your great work...