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"An unexpected error occurred (error code -43)" when launching Time Machine

Hi! When attempting to launch Time Machine, I get the following error:

The operation could not be completed
An unexpected error occurred (error code -43)

My machine is a 2.8 GHz Quad-Core Intel Xeon running 10.5.8

What's strange is that Time Machine DID work just the other day. It would launch automatically when I plugged in my external HD (Maxtor One Touch) though I didn't set it up to back up yet. After I reformatted the drive to Mac OS Extended (Journaled), Time Machine started giving me this error and won't launch. Any ideas here? Thanks!

Mac Pro, Mac OS X (10.5.8)

Posted on Feb 1, 2011 11:18 AM

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Posted on Feb 1, 2011 11:40 AM

When you reformatted, it got a new UUID (Universally Unique IDentifier), which may be confusing Time Machine. Try just reselecting it, per +Time Machine Preferences.+

If that doesn't help, try a "full reset" of Time Machine, per #A4 in [Time Machine - Troubleshooting|http://web.me.com/pondini/Time_Machine/Troubleshooting.html] (or use the link in *User Tips* at the top of this forum).
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Question marked as Best reply

Feb 1, 2011 11:40 AM in response to Eric Carl

When you reformatted, it got a new UUID (Universally Unique IDentifier), which may be confusing Time Machine. Try just reselecting it, per +Time Machine Preferences.+

If that doesn't help, try a "full reset" of Time Machine, per #A4 in [Time Machine - Troubleshooting|http://web.me.com/pondini/Time_Machine/Troubleshooting.html] (or use the link in *User Tips* at the top of this forum).

"An unexpected error occurred (error code -43)" when launching Time Machine

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