Sync Issues with Bitcoin Core and Legacy Addresses

Running Bitcoin Core 20.1 on Ubuntu 24.04. It stops syncing at block 623950 with this error: ConnectBlock failed. Anyone know how to fix this?

You should really consider upgrading to a newer version. Maybe 0.26? It’s a lot better and still supports legacy wallets.

Pro tip: use code tags in your posts. Makes it easier for everyone to read.

Thanks for the tip! But 20.1 is the last version that works with Berkeley DB. I need my old uncompressed addresses... Importing them into the latest version is a mess too.

First merit for being quick on the uptake!

Yeah the latest version ditched Berkeley DB for SQLite. Descriptor wallets can’t use importprivkey either. Check the guides here on how to import legacy wallets.

That won’t work with compressed WIF keys. You need to use the uncompressed version for legacy addresses.

I used v26.1.0 with uncompressed addresses just fine. Backup your wallet and give it a shot!

Installed version 26, and I got the legacy address added! But man, dealing with that syncing issue was a nightmare.

Just a heads up, using the 'combo' descriptor with a WIF key without a compressed flag is pointless. It won't derive the right scripts.

I have both compressed and uncompressed WIF keys. In the latest version, I couldn’t add a legacy uncompressed address at all! Had to revert to 20.1 for that.

Good on ya for sticking with it. Welcome to the forum, and good luck with your coins!