Where do I look in iTunes to find sync errors? I have started to get some error messages about items failing to sync. It seems to be a sporadic issue - and the error pictured below was for a sync attached to the USB cable. I do have WiFi sync enabled for this device and it also happens when I'm syncing wirelessly, so the presence or absence of the cable seems to be unrelated to the error.



Opening iTunes on iOS doesn't seem to tell me what failed. The same goes for iTunes on my Mac. Does anyone have a clue where "more information" is logged in this case? Although many are suggesting ways to eliminate the error (trial and error), I'm more interested in where the error log lies. It baffles me there isn't some debug more or way to hook into iTunes to get a log of the problems.

Where else can I look for this information relating to sync errors?
I had the error again this morning - three items failed to sync.

I do finally have a potential culprit. The presence of App store updates seems to correlate with these errors. It fits all the criteria so far that come to mind. 


temporary and sporadic (most of the time, I'm not in the process of downloading apps while syncing and even with simultaneous downloads, my internet is such that this is generally a 1-10 second window or less per app)
resolves itself without needing user intervention


I've poked at this several times and it doesn't seem to correlate with the sync errors in a pattern that I can detect. 

The only explanation I can guess is that there is no log where these errors are collected.