Aperture Library Corrupted: tried everything I know. Please HELP!

I really need some help. I have a Aperture Library about 700GB that I feel is corrupted. I believe what caused this is I started editing a file before the import finished processing. Now, the system crashes on startup or after making one change. I have done the following.
1. Reinstalled Aperture
2. Repaired the permissions of all the files
3. Repaired the database
4. Rebuilt the database

I still have the same symptoms. Has anyone here had an issue like that and what did you do to solve it?

Thanks for any suggestions.

Lem7

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Lem7