I've seen this same problem littered around various forums via Google
searches, but haven't really found an answer.

It just started reporting this error, nothing changed on the POA maintenance
tasks to trigger it.
I deleted all tasks and re-created them, but obviously that didn't work.

The task it's doing it on is the daily structure and index check. It may
report it on other events too, but it's been less than a week since
re-creating the jobs so I will know by Monday.

Any ideas?
Thanks in advance