Error messages

Is there a list of error messages and possible causes?
I have an imp that has been running reliably for some time and has now stopped with “imp restarted, reason: wifi error”.
This error was repeated every 1/2 hour for about 4 hours then it stopped.
Any ideas?
Thanks
Peter

The error stopped or the imp stopped after 4 hours?

Sorry, not very clear - working on too many things at the same time!
log:
2/22/2013 3:24:33 AM: imp restarted, reason: wifi error
2/22/2013 3:54:56 AM: imp restarted, reason: wifi error
2/22/2013 4:27:28 AM: imp restarted, reason: wifi error
2/22/2013 5:01:11 AM: imp restarted, reason: wifi error
2/22/2013 5:27:46 AM: imp restarted, reason: wifi error
2/22/2013 6:03:14 AM: imp restarted, reason: wifi error
2/22/2013 6:10:29 AM: imp restarted, reason: wifi error
2/22/2013 7:34:19 AM: imp restarted, reason: wifi error
2/22/2013 7:36:28 AM: imp restarted, reason: wifi error
2/22/2013 7:37:25 AM: imp restarted, reason: wifi error
2/22/2013 7:37:43 AM: imp restarted, reason: wifi error
2/22/2013 8:14:32 AM: imp restarted, reason: wifi error
2/22/2013 9:02:14 AM: Power state: online=>offline
2/22/2013 9:05:55 AM: imp restarted, reason: wifi error
2/22/2013 9:05:55 AM: Power state: offline=>online
2/22/2013 9:05:55 AM: Device booting
2/22/2013 9:05:55 AM: Device configured to be "Wren1"
2/22/2013 9:05:56 AM: 235f493643fc42ee
2/22/2013 9:32:42 AM: imp restarted, reason: wifi error

Not sure on the constant restarts for you (what power source are you using?) but there’s a bug in the current release whereby the error code sent at restart is not cleared - so you likely had one wifi error (where we reboot because the wifi chip has got in a pickle) but then it kept reporting the same error.

Thanks Hugo