EEPROM errors and Stack Overflow (ErrorFlags)

Based in large part on the info here I've recorded the value of ErrorFlags across all the units on one site.

At the current time, I have 63 which have bit 1 set (Stack Overflow), something Don had never seen. I also have 13 showing EEPROM checksum error (bit 5).

Additionally one unit is reporting both bits 4 and 7 ("reserved") - that unit has ErrorFlags=159, ie all errors except the two EEPROM ones.

There are 1400 units in total.

What should I deduce from this?

 

Ha, yeah maybe.

I have some of that data although it'll take a bit of playing to extract it. But I'm interested too so I'll see what I can find.

That's the bit that most interests me but as has been discussed here before I don't seem to have any way to reset the flags (that works) so I don't know if they just "accumulate" or clear on their own periodically (and if so when/why). I thought in the past that restarting CGate (or close/flush/open/sync network) would clear them but all of the results in the OP were reasonably soon after a server restart so I don't think that's the case either.

The logging of ErrorFlags came about because I already had code to log whether units have been overridden (which is a useful indicator that lights might not be doing what the head end thinks they're doing), and adding in ErrorFlags was a trivial addition. I would like to see the history of stuff like transmit errors over time - something the normal diagnostic tools can't give me. In the absence of a good way to reset errorflags I'm a bit stuck though.