I am having the same problem with iPhone 5, iOS 9.2.1, and MM 4.1.12.1784 on Win 8.1. A few songs will copy, then the copying gets stuck. I've tried deleting all music, I've tried restoring factory settings and restoring backup, but nothing works - I always come back to copying stopping after just a few songs.

I finally bit the bullet and did a full "Reset to Factory Settings" then restored my iPhone based on a backup. It worked. Now it works perfectly with MM 1780. The problem was something internal to my iPhone and had nothing to do with MM apparently.

Already using 1780, so maybe something different?

Hi, please give a try with the latest build 1780 : http://www.mediamonkey.com/forum/viewto ... 55#p419090

It looks like another instance of http://www.ventismedia.com/mantis/view.php?id=13043

New thought: Could this relate to the sync issue some users have had? In the changelog, it recommends: "re-init of AMS service." Not sure what that means or how to do it - any suggestions?

To follow up, I seem to be getting a lot of this:

792.797s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate792.797s - PID:8556 - iPhone:_Waiting for grappa data...
792.906s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate
792.906s - PID:8556 - iPhone:_Waiting for grappa data...
793.000s - PID:8556 - iPhone:_Waiting for grappa data...
793.000s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate
793.109s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate
793.109s - PID:8556 - iPhone:_Waiting for grappa data...
793.203s - PID:8556 - iPhone:_Waiting for grappa data...
793.203s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate
793.296s - PID:8556 - Device:_Waiting for CopyDevice thread to terminate
793.296s - PID:8556 - iPhone:_Waiting for grappa data...

Replying to myself - Couldn't log in before, was in a weird loop with the login system - just adding this reply so this shows up in my queue. Thanks.

I have an iPhone 5 running iOS 9.2.1. Even when just 9.2, the last version of MM (including the latest beta update 4.1.11.1780) will not let me copy more than one song at a time to my iPhone. And often the copy hangs and cannot complete. It seems to work when I open iTunes, sync the phone to my Windows PC, then return to MediaMonkey and sync again there. Then it will allow me exactly one song to copy, but not if I have highlighted several to copy at once. I literally have to just select one. It copies that one song quickly, but that's it.

Any thoughts? This seems like a weird one.

Thanks!