error occurred (-3234) when syncing iPhone

I have had this issue too and immediately thought it was iTunes/Music problem due to ever increasing sync issues. But I finally figured out that because my library of music was on Dropbox AND Dropbox changed on Mac (now a cloud drive) my music was not actually loaded on my hard drive and thats where all the 3234 and not available in my region started.

Once I forced download of files from cloud to my hard drive that fixed the issue. The issue now is with Dropbox automatically releasing storage on my hard drive. Hope this helps others, it has been driving me nuts.

I had the same issue, but using iCloud to store my music. Syncing it probably hangs if the network is slow up/down to the cloud. I forced all my music down to my MBP and it is now syncing OK.

There are two bugs in this:

1. Instead of skipping songs that aren't synced. it aborts the entire sync. It should work such that it skips them, completes the sync, and gives you a list at the end of the ones that could not be synced.
2. No retries of music that is in iCloud. I have a pretty fast connection and was surprised that this is an issue. Maybe a temporary network glitch, sure, but retry a few times to see if it cleared up, then skip it is still not successful and sync the rest of the files.

@Mouldboss not quite true, it only applies to files that have been offloaded to the cloud (Dropbox or any other) and no longer resident.

The resolution is to mark the folder containing your music as always resident on your HD. It makes sense that the files have to actually be availabe to transfer to iPhone/iPad rather than a placeholder in the file system that says you have a file, but in the cloud.

You can still have Dropbox manage your music and keep sync’s versions on the cloud for use across all your devices (and more importantly for backup).

I wish there was a cleaner way for this to be discovered, but it is what it is!

I figured it out today. Dropbox is the issue. It won’t let you sync anything to your phone that’s on Dropbox

Hello whoishimz,

Thanks for using the Apple Support Communities!

If you're having trouble syncing your content and playing it back on your devices, you'll want to reach out to Apple Support. They'll be able to look in to that with you and see what's happening.

You can reach out to them here: Get Support

Take care!

I had the same with OneDrive. You must download the music to your drive before you can sync. A bit of a bummer and removes the benefit of storing the music on the cloud.

I use OneDrive as repository for my music and had the same issue as you faced.

I had to download all the music to my hard drive to resolve the problem, following your tip and your resolution

Thanks a lot