i have located all the private keys from my bitcoin core wallet and have then created a new Electrum wallet
i have then:
click Wallet -> Private Keys -> Sweep
i have tried to use the private key for 14G3Tr7PAb2L8xZKy2ib7MH9MscXHkQphj
it comes back saying: "no inputs found (note that inputs need to be confirmed)
i have read in this thread someone had the same problem and managed to solve it: https://bitcointalksearch.org/topic/problem-trying-to-sweep-paper-wallet-into-electrum-2254231
"Sorted!
Evidentally I should have been using the "WIF compressed address", and not the "WIF address".
I'm not sure why, but, hey, it works!!"
i don't know what the above means, can anyone help?
thanks
Well, to tell you the truth, as far as i can tell, electrum is correct: all unspent outputs funding that address HAVE been spent...
The address was funded with transaction 3fae9880f8a3dc9641a24114f5ab2fd502ae47a179478f5b360ee3c9156c1be1, but on 24/07/2013 the unspent output was spent in transaction 56e734f3f5df475f81469a339eb908e8f3e9f941f4ce36cf8d8febc6da24325c
https://blockchain.info/unspent?active=14G3Tr7PAb2L8xZKy2ib7MH9MscXHkQphj&format=html
So, if you try to sweep (or import) the private key belonging to 14G3Tr7PAb2L8xZKy2ib7MH9MscXHkQphj, it's logical electrum will give you an error...