I'm trying to unlock an ethereum user account using geth, but am getting an error message that doesn't make sense to me.
Here's what I do:
1) I start the geth console connected to the ropsten network:
geth --testnet console
2) Then I try to use the
personal.unlockAccount('<account address>', '<key phrase>', 1000);
Then I get the error:
Error: no key for given address or file
I'm not sure why I might be getting this message or what it means exactly. Can anyone help?