Archived - iPhone and iPod touch: An unknown error (13014), (13136), or (13213) may occur after updating to iTunes 8.0.1 or later
After updating to iTunes 8.0.1 or later and connecting iPhone or iPod touch one of the following error messages may occur:
"The iPhone "iPhone name" cannot be synced. An unknown error occurred (13014).
"The iPhone "iPhone name" cannot be synced. An unknown error occurred (13136).
"The iPhone "iPhone name" cannot be synced. An unknown error occurred (13213).
Use these solutions, one at a time to try and resolve the issue.
Make sure you have the latest version of iTunes installed.
Quit and reopen iTunes. If the issue continues, then restart your computer.
Quit iTunes, temporarily disable the anti-virus security software on your computer, then reopen iTunes and try to sync your device. If iTunes successfully syncs your iPhone or iPod touch, consult the anti-virus software vendor.
Turn off Genius in iTunes in the Genius sidebar (choose View > Hide Genius Sidebar).