iTunes iPad backup failed due to iPad disconnected
During iTunes backup of an iPad 2 I keep getting the following message:
"iTunes could not backup the iPad "xxxxxxxx" because the iPad disconnected."
However the iPad is still connected (physically).
I do a manual backup to iTunes on an iMac.
Only the one USB port is in use.
Backup to iCloud is working well.
Anybody else encountered this or knows a cause or solution?
iPad 2, iOS 8.4.1, 64Gb WiFi