It's launch of Geth:
geth --testnet --fast --rpc --verbosity 0
The start of interaction with console:
geth attach ipc:/.../geth.ipc
Console works great but when I inputs the following command:
personal.unlockAccount(eth.accounts[0], "psw", 0)
(different parameters: with/without duration, "eth.coinbase" or just adress name instead of eth.accounts[0], etc)
console is blocked for several minutes. At the same time Geth does not work for all sessions, RPC is disable. Finally it returns
Error: Invalid JSON RPC response: {"error": {"EOF":"EOF", "code":-32603}, "id":11, "version":"2.0"}
Geth process is killed.
What is it?