I get this each time I try to open my bitcoin-qt

System error: CDB() : can't open database file wallet.dat, error -30974

I can't find any posts showing that same error #.

I installed a new copy of bitcoin-qt on another computer and tried both my wallet from the old one then my backedup copy of the wallet.  Both still caused this error.  It happens if I try to do anything with the wallet.  If I just let it sync it runs for a while then shows the error.  Once it shows the error I am forced to press ok and the program closes.

Both machines are running Ubuntu.

Any ideas?