Technical data

FTP Error Codes

421 Service not available, closing control connection. (May be a reply to any

command if the service knows it must shut down.)`

425 Can't open data connection.

426 Connection closed; transfer aborted.

450 Requested file action not taken. File unavailable (e.g., file busy).

451 Requested action aborted: local error in processing.

452 Requested action not taken. Insufficient storage space in system.

 500 Codes—The command was not accepted and the requested action did not take

place.

500 Syntax error, command unrecognized. This may include errors such as

command line too long.

501 Syntax error in parameters or arguments.

502 Command not implemented.

503 Bad sequence of commands.

504 Command not implemented for that parameter.

530 User not logged in.

532 Need account for storing files.

550 Requested action not taken. File unavailable (e.g., file not found, no access).

551 Requested action aborted: page type unknown.

552 Requested file action aborted. Exceeded storage allocation (for current

directory or dataset).

553 Requested action not taken. Illegal file name.