Restore Errors/31xx

Error 3194
Occurs when trying to install an old firmware and Apple's server disallows the installation. The only solution is to have the SHSH blob backed up and modify the hosts file to point to Saurik's Cydia Server where they are backed up (or localhost if you have it yourself). Also happens if restoring to the latest iOS and the hosts point to Cydia. Remove gs.apple.com lines in hosts file. Another message that this error can display is "not eligible for requested build".

Error 3195

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