ITunes Errors/31xx

Error 3123

Something dealing with movie rentals.

Error 3191

QuickTime may be corrupted. You must reinstall it before iTunes will work. Windows users, also try turning off Compatibility Mode for QuickTime.

1. Right-click on "C:\Program Files\QuickTime\QuickTimePlayer.exe" ("Program Files (x86)" for 64-bit Windows) and choose Properties from the shortcut menu.
2. In the Properties window, click on the Compatibility tab. Deselect the checkbox labeled “Run this program in compatibility mode for.”
3. Click Apply.
4. Close the Properties window

Error 3194

Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have SHSH backup and modify the hosts file to point to Saurik's Cydia Server where they are backed up (or localhost if you have it yourself).

Error 3195

• There is no SHSH for the firmware.
• This is the same as "This device isn't eligible for the request build." but with an cache error.