what are your Aperture 3 version and Mac OS X version exactly? And have you tried already any trouble shooting? Have you installed or upgraded anything else lately? What were you doing, before the trouble started? Imported any new images or videos?
I'd start with repairing your Aperture library; if Aperture cannot move items or select items, the library may be corrupted.
See on how to launch the Aperture 3 Library First Aid Tools: Repairing and Rebuilding Your Aperture Library: Aperture 3 User Manual and start by repairing the permissions, then repairing and rebuilding. Back up your Aperture library, before you do this, just in case your backup should not be current.
I am using Aperture 3.4.1 using OS lion 10.7.5. I had just imported a picture to edit. I also tried to unflag some existing photos. Then I noticed the strange behavior. I eventually was able to trash the recently imported picture, moved out of Aperture Library to IPhoto Library in Aperture and then back to Aperture library. The problem seemed to clear up without doing a library rebuild. Thanks for the help. I will keep the rebuilding and repairing tool in mind for future reference.
johnfromnorth andover wrote:
The problem seemed to clear up without doing a library rebuild. Thanks for the help. I will keep the rebuilding and repairing tool in mind for future reference.
Repair and Rebuild work well. One should (imho, of course ) repair any Library after any inexplicable database behavior (here "Library" is just marketing jargon for database).
One should always run "Repair" after force-quitting Aperture.
I suggest running "Repair" on every large (>100,000 Images) or heavily-used (>20 h/wk) Library as part of one's routine maintenance (at least 1/mo). (Of course one should have a confirmed back-up first, but I have _never_ had a Library damaged by either "Repair" or "Rebuild" -- and if you use Aperture you should have near daily back-ups anyway.)
Message was edited by: Kirby Krieger -- added quoted part.