Q: Trying to open Aperture, but I get the message, "There was an error opening the database for the library “/Users/davewasson/Pictures/Aperture Library.aplibrary”. - and it forces me to quit. What do I do?

Is there a crash log or are their any diagnostic messages in the Console window?

Do you get the same message, when you launch Aperture by directly double clicking the Aperture library in your Pictures folder?

Regards

Léonie

Dave-

You can try opening the old (problem) library by launching Aperture into Library First Aid mode and choosing to Repair (first option) or Rebuild the library. Before doing this, make a backup copy of the old library, since both Repair or Rebuild will write changes to the library database.

Repair is the faster and less drastic option, so try that first: After backing up your library, hold down both the Option and Command keys while dragging and dropping the problem library on the Aperture icon. The Photo Library First Aid window appears. Select Repair Database, then click Repair. After some time Aperture should open the library, if possible.

If that fails launch Aperture back into Library First Aid and select Rebuild Database. Depending on the size of your library this operation could take some time, up to several hours for a very large library. When the main window appears you may have some extra Recovered folders/projects. This operation rebuilds the library from scratch and is usually successful at reviving problem libraries.

Troubleshooting Basics page.