Bitcoin Client 11DbException

[Jazkal]

So I store my wallet.dat files offline in a truecrypt file. When I want to send BTC I shutdown the bitcoin.exe app and swap out the wallet.dat file. And then run a -rescan to load up the updated wallet.dat file.

This process has been working fine for some time now. But now all of a sudden, I can't get the client to accept any of my stored wallet.dat files without giving an error and crashing.

Error I get when I try and load up a stored wallet.dat file:

EXCEPTION: 11DbException
Db::open: Invalid argument
C:\Program Files (x86)\Bitcoin\bitcoin.exe in AppInit()

If I then delete my backed up wallet.dat, and launch the bitcoin.exe app again, it creates a new fresh wallet.dat file without any errors.

I've tried deleting the block chain, and re-downloading from scratch, but it doesn't work.

I've tried wiping all traces of the bitcoin client from the system, and doing a fresh install, and still no luck.

Any other ideas I have missed?

[CoinMan]

Interesting two of you having the same problem so close to the same time.

The advice I gave in another thread has been my tried and true way to a restore.  Please see here...

https://bitcointalk.org/index.php?topic=39623.0

[jackjack]

The permissions are correctly set?
Anyway, like the other thread, keep a copy of the current wallet.dat(even in another truecrypt file), you never know what can happen

[Jazkal]

With the bitcoin client closed.  Delete all the files except for bitcoin.conf and wallet.dat.  Open bitcoin client and let it redownload the blockchain.

CoinMan

Did that, and still got the error as soon as I launched bitcoin.exe

[CoinMan]

Ugh.  Sorry to hear that.  Do you have a prior copy of your wallet.dat backed up somewhere?  Perhaps somehow your wallet.dat is now corrupt. 

[jackjack]

Try opening it with pywallet
If it doesn't work scan your drive for private keys (pywallet does that only for Linux/OSX but there are plenty of such tools over here)