Bitcoin Forum

I tried to transfer bitcoin to a new wallet address and I encountered this error when I was trying to transfer
Someone please help me
I am using the old version of bitcoin-qt-0.8.5

https://imgur.com/nLP17lP
https://imgur.com/r5vR7Aw

You should wait until the synchronization ends. How could the wallet know you didn't spend those coins already if it's not synchronized?

edit: Alternatively you can import the relevant keys into Electrum and spend right away, but I don't have a computer at hand now for the steps and it's riskier (you expose the private keys)

The second error was just a result of the first, so the issue is "signing" that might be cause by not having the correct private key of the used inputs.

Also, you need to be informed that your current balance isn't "final" because your client isn't synced yet,
although I highly doubt that version 0.8.5 will be able to sync.

What's keeping you from upgrading to the latest version?
You can backup the wallet and/or create a dump file if you're worried to lose your wallet if you upgrade to 0.19.0.1.

Yes, I understand this is my second sync download
The private key is inside the wallet.dat................

bitcoin-qt and Wallet.dat are my old found data
I have tried with the new version unable to open

If that's the case, use dumpprivkey "address" command to export the wallet's private key(s).
The faster method, 'dumpwallet' wasn't available for that version.

Do you know which addresses have a balance?
If so, confirm it from a blockexplorer, then use that command in the console: 'Help->Show Debug Window->Click "console" tab'.
Example:If the wallet have a passphrase, enter this first before the dumpprivkey command:
(the commands requires the quotation marks, do not remove them)

Then copy the private key and import it to Electrum (electrum.org (http://electrum.org)) using "Import Bitcoin addresses or private keys" option when creating a new wallet.