Tvheadend

Looks like you had 2 same recordings scheduled at the same time. Check you upcoming recordings to see if you have duplicates. When this happens, one recording works, but the other fails usually because it cannot create the already created file.
Do you have multiple autorec entries?

Thanks for responding. Looking at upcoming recordings is a good clue what's going on. Looking at Autorec rules I don't see any duplicates

But I do see odd things in upcoming recordings. Namely many don't have the autorec icon showing. And if I click on the "info" icon it shows and invalid status. Attached is an example

If you sort by start time, the duplicates will be more clear.
I also have no idea why the duplicates have no channel name? Has your channel mapping or epg grabber channels changed???

In 4.3 there have been lots of fixes for autorec, so it is probably a good idea to upgrade. I think soon 4.3 will become the new stable 4.4, but not sure exactly when...