Bitcoin Forum

Dear All,

long-time Electrum user here and I ran into a really strange problem. I created a new 2fa wallet and then sent bitcoins to one of its addresses from an exchange. The coins were properly received as evident from https://www.blocktrail.com/BTC/address/3Co8FdRwsRRYowbHaryoUHi8vQfGAht2Sj (https://www.blocktrail.com/BTC/address/3Co8FdRwsRRYowbHaryoUHi8vQfGAht2Sj)

However Electrum is unable to sync this new wallet. Now I narrowed it down even further:

If I create a new watch only wallet with the adress in question: 3Co8FdRwsRRYowbHaryoUHi8vQfGAht2Sj then Electrum is no longer able to sync it and balance is always shown as 0.0.

Note: It is not my device / internet connection -> I can successfully sync all my other electrum wallets and I already tried different devices and connections.

Anyone encountered anything like that? Can you succesfully create a watch only wallet with my BTC address: 3Co8FdRwsRRYowbHaryoUHi8vQfGAht2Sj

Thanks a lot in advance!

I managed to make your a watch-only wallet using your address and it worked fine. It's showing 0.1096 BTC as balance. Electrum connect to a server to retrieve the transaction history and balance so the only thing that I can think of is to change the server. I'm currently connected to 185.64.116.15 so you can try it.

Thank you very much for trying Omega!

Interesting that it works for you though. For me it doesn't.

Even if I use 185.64.116.15 as server as you did. And I tried with version 3.0.5 on Windows, 2.9.x on Tails and with the current Android version on the phone (using mobile data and thus eliminating the lan).

 ??? ???

P.s.: Which version / client did you use?

Depending on which operating system you are using you can try to delete blockchain_headers file which is located here : http://docs.electrum.org/en/latest/faq.html and then run Electrum and let it sync.It is possible that some of the files are corrupted since you eliminated a problem with synchronization.

Before you do anything be sure to have backup of your wallet files/seed.If deletion of blockchain_headers file does not help,you should try clean install of Electrum which means uninstallation of Electrum and deletion of Electrum folder with all data.

One extra remark: stop running 2.9.x on Tails... If you run 2.9.x, you're running a version with a huge bug that can be exploited, even on tails...

Thanks a lot for your answers Lucius and mocacinno,

the thing is i already tried with Electrum version 3.0.5 on 3 different operating systems, each time with a clean install. So blockchain_headers file, etc. cannot be the cuplrit.

I tried several different versions of electrum now and the only version that is able to properly sync and get the transaction history for 3Co8FdRwsRRYowbHaryoUHi8vQfGAht2Sj for me is version 2.9.2 which i used to transfer my coins into a new wallet that i created with 3.0.5 and that is working properly now...:-)

Just so you know you were hit by this bug: https://github.com/spesmilo/electrum/issues/3788

It's been fixed and the fix should be there in the next release.