Time Machine is a life saver. I was backing up a machine recently and error was thrown. Indicated in a form like this message (this message occurs on a machine running Lion and I am running Snow Leopard 10.6.5).

Error From Time Machine

Due to the suggestions by James Pond ^[1] James Pond. 8 August 2011. C3. Time Machine – Troubleshooting. http://web.me.com/pondini/Time_Machine/C3.html. [Accessed: 9 October 2011] [Link] , I found that there was a widget called Time Machine Buddy ^[2] James Pond. 16 August 2011. A1. Time Machine – Troubleshooting. http://web.me.com/pondini/Time_Machine/C3.html. [Accessed: 9 October 2011] [Link] . I downloaded the widget and it told me what the offending file was. I deleted the file and happily backed up the rest of my drive. I don’t know what caused Error 11 or exactly what that is but, the deletion of the file, which was not crucial to keep, allowed me to continue.