Comprehensive List of FTP Status and Error Codes

100 Series

The requested action is being initiated, expect another reply before proceeding with a new command.

110

Restart marker reply.

120

Service ready in nn minutes.

125

Data Connection already open, transfer starting.

150

File status okay, about to open data connection.  FTP uses two ports: 21 for sending commands, and 20 for sending data. A status code of 150 indicates that the server is about to open a new connection on port 20 to send some data.

200 Series

The requested action has been successfully completed.

200

Command okay.

202

Command not implemented, superfluous at this site.

211

System status, or system help reply.

212

Directory status.

213

File status.

214

Help message.

215

NAME system type. (Where NAME is an official system name from the list in the Assigned Numbers document.)

220

Service ready for new user.

221

Service closing control connection. Logged out if appropriate.

225

Data connection open; no transfer in progress.

226

Closing data connection. Requested file action successful (for example; file transfer or file abort). The command opens a data connection on port 20 to perform an action, such as transferring a file. This action successfully completes, and the data connection is closed.

227

Entering Passive Mode.

230

User logged in, proceed.  This status code appears after the client sends the correct password. It indicates that the user has successfully logged on.

250

Requested file action okay, completed.

257

"PATHNAME" created.

300 Series

The command has been accepted, but the requested action is on hold, pending receipt of further information.

331

User name okay, need password.  You see this status code after the client sends a user name. This same status code appears regardless of whether the user name that is provided is a valid account on the system.

332

Need account for login.

350

Requested file action pending further information.

400 Series

The command was not accepted and the requested action did not take place, but the error condition is temporary and the action may be requested again.

421

Error 421 Service not available, closing control connection.
Error 421 User limit reached
Error 421 You are not authorized to make the connection
Error 421 Max connections reached
Error 421 Max connections exceeded

Possible Solutions:

You may receive a 421 error if the FTP server you are connected to limits the total number of connections available or limits the connections available to one user.  There are three things you can do:

1. Limit the number of connections to any one FTP site by selecting Tools > Global Options > Connection and set "Per site max connections / transfers" to 1 (By default it will be set to 2).

2. Remove items from the Transfer Queue.  The Transfer Queue is where you see items ready for transfer, in transit, or just transferred.  Sometimes the Queue Pane can become cluttered with unfinished transfers.  To clear the queue, right-click inside it and choose Remove All.

3. Make sure only one instance of CuteFTP is running on your system.  Open the Windows Task Manager and see if CuteFTP is listed more than once.

425

Can't open data connection.  

Possible Solutions:

1. Try changing from PASV to PORT mode.

2. Check your firewall settings.

3. Try making an HTTP connection.

426

Connection closed; transfer aborted.  The command opens a data connection to perform an action, but that action is canceled, and the data connection is closed.

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 Series

The command was not accepted and the requested action did not take place.

501

Syntax error in parameters or arguments.

502

Command not implemented. The server does not support this command.

503

Bad sequence of commands.

504

Command not implemented for that parameter.

530

Not logged in.  Your password is being rejected, contact the server administrator.  This status code indicates that the user cannot log on because the user name and password combination is not valid. If you use a user account to log on, you may have mistyped the user name or password, or the server may be configured to allow only Anonymous access. 

532

Need account for storing files.

550

Requested action not taken. File unavailable (e.g., file not found, no access).  Contact the server administrator.  The command is not executed because the specified file is not available. For example, this status code occurs when you try to download (GET) a file that does not exist, or when you try to upload (PUT) a file in a directory for which you do not have Write access.

552

Requested file action aborted. Exceeded storage allocation (for current directory or data set). Contact the server administrator.

553

Requested action not taken. File name not allowed.  Try changing the file name, or getting rid of spaces in the file name.

10,000 series

Common Winsock Error Codes (complete list of Winsock error codes)

10054

Connection reset by peer. The connection was forcibly closed by the remote host.

10060

Can't connect to remote server (Generally a time-out error).  Try switching from PASV to PORT mode, or try increasing the time-out value (See Reconnect and resume in Transfer settings).

10061

Can't connect to remote server. The connection is actively refused by the server.  Try switching the connection port.

10066

Directory not empty. The server will not delete this directory while there are files/folders in it.

10068

Too many users, server is full. Try connecting later. If the problem persists, Contact the server administrator.