Time machine (error (null)).

Please read Pondini's Time Machine troubleshooting guide, you can find it by clicking Time Machine Troubleshooting

Hi MikCas,

To fix it , just go thru the airport utility and erase the hard drive since the stored data related to your unit is corrupted.

Other data such as loos files, folders and other backups can be moved to a separate hard drive before erasing disk.

Pedro

Don't erase your drives just yet! Just re-adding the backup drive solved it for me.

I got this error too. I read here that a guy with a similar setup like me (multiple macs backing up to the same drive) could be solved with some fiddling with removing the drives and re-adding them.

From the computer that failed giving error (null) I went to the Time Machine preferences and removed the active Time Capsule drive. I then proceeded to choosing a new drive for my backup, chose the exact same one, encrypted as I had it before. I was asked the password for my Time Machine and then prompted if I wanted to start a new backup or reuse the old one (at this point I think you computer must be named the same as the .sparsebundle-file on the backup drive in order to find it again). I went for the old one, typed the password of my old backup, and it reconnected and now backed up flawlessly. My old backups are still there too.

I did all this over ethernet since I've had some funny thrown-of-after-15-seconds problem on my wireless after adding a rooter two weeks back, and that it was around then that my laptop stopped backing up and producing the (null)-error.

Thanks for the input. I tried that before wiping out the hard drive and it didn't work. I guess that there's more than a single solution for a given issue.

That's great to know. We aught to have had different reasons for our errors.