could not list accounts 에러~~

C:Userspsn>geth --networkid 1000 --mine --minerthreads 2 --datadir "./" --nodiscover --rpc --rpcport "8546" --rpccorsd
omain "" --nat "any" --rpcapi eth,web3,personal,net --unlock 0 --password ./password.sec
INFO [02-13|12:57:37.584] Maximum peer count ETH=25 LES=0 total=25
INFO [02-13|12:57:38.086] Starting peer-to-peer node instance=Geth/v1.8.22-stable-7fa3509e/windows-amd64/g
o1.11.5
INFO [02-13|12:57:38.129] Allocated cache and file handles database=C:Userspsngethchaindata cache=512 ha
ndles=8192
INFO [02-13|12:57:38.313] Initialised chain configuration config="{ChainID: 1 Homestead: 1150000 DAO: 1920000 D
AOSupport: true EIP150: 2463000 EIP155: 2675000 EIP158: 2675000 Byzantium: 4370000 Constantinople: 7280000 Constantinop
leFix: 7280000 Engine: ethash}"
INFO [02-13|12:57:38.397] Disk storage enabled for ethash caches dir=C:Userspsngethethash count=3
INFO [02-13|12:57:38.433] Disk storage enabled for ethash DAGs dir=C:UserspsnAppDataEthash count=2
INFO [02-13|12:57:38.472] Initialising Ethereum protocol versions="[63 62]" network=1000
INFO [02-13|12:57:38.731] Loaded most recent local header number=0 hash=d4e567…cb8fa3 td=17179869184 age=49y10
mo3h
INFO [02-13|12:57:38.773] Loaded most recent local full block number=0 hash=d4e567…cb8fa3 td=17179869184 age=49y10
mo3h
INFO [02-13|12:57:38.827] Loaded most recent local fast block number=0 hash=d4e567…cb8fa3 td=17179869184 age=49y10
mo3h
INFO [02-13|12:57:38.881] Loaded local transaction journal transactions=0 dropped=0
INFO [02-13|12:57:38.930] Regenerated local transaction journal transactions=0 accounts=0
INFO [02-13|12:57:39.634] New local node record seq=12 id=8dd6640faf5e44e9 ip=127.0.0.1 udp=0 tcp=303
03
INFO [02-13|12:57:39.685] Started P2P networking self="enode://10e56da91c5cc897501ab8175c7e5c4c7bbf236
c24ad9a711698570db95310a4748d8a196cd20400450aa876fc383acb73f59581b74edab9659949d15795a167@127.0.0.1:30303?discport=0"
INFO [02-13|12:57:39.637] IPC endpoint opened url=.pipegeth.ipc
INFO [02-13|12:57:39.806] HTTP endpoint opened url= http://127.0.0.1:8546 cors= vhosts=localhost
WARN [02-13|12:57:39.841] -------------------------------------------------------------------
WARN [02-13|12:57:39.872] Referring to accounts by order in the keystore folder is dangerous!
WARN [02-13|12:57:39.903] This functionality is deprecated and will be removed in the future!
WARN [02-13|12:57:39.936] Please use explicit addresses! (can search via geth account list)
WARN [02-13|12:57:39.983] -------------------------------------------------------------------
Fatal: Could not list accounts: index 0 higher than number of accounts 0