Wallet is already unlocked
Failed to encrypt the wallet
Not enough funds in wallet or account
Invalid label name
Keypool ran out, call keypoolrefill first
Invalid wallet specified
No wallet specified (error when there are multiple wallets loaded)
The wallet passphrase entered was incorrect
Enter the wallet passphrase with walletpassphrase first
Unspecified problem with wallet (key not found etc.)
Command given in wrong wallet encryption state (encrypting an encrypted wallet etc.)