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Question:

ftp restart upload

Jan 25 '17 at 08:40

Hi, i try to restart an upload, but is nit Working.

ftp.RestartNext = True
Await System.Threading.Tasks.Task.Run(Sub() lftp.PutFile(localPath, remoteFilename))

Here the LastErrorText:

ChilkatLog:
  PutFile:
    DllDate: Dec 27 2016
    ChilkatVersion: 9.5.0.65
    UnlockPrefix: Anything for 30-day trial
    Architecture: Little Endian; 64-bit
    Language: .NET 4.6 / x64
    VerboseLogging: 0
    Component successfully unlocked using trial key
    RemoteFilename: EA201504.zip
    LocalFilename: H:\Temp\coFtpSync\EA201504.zip
    ProgressMonitoring:
      enabled: yes
      heartbeatMs: 0
      sendBufferSize: 65536
    --ProgressMonitoring
    IdleTimeoutMs: 60000
    ReceiveTimeoutMs: 60000
    ConnectTimeoutSeconds: 30
    uploadFromLocalFile:
      localFileSize: 1061931910
      uploadFromDataSource:
        initialGreeting: 220 ProFTPD 1.3.3g Server (NETGEAR ReadyNAS) [192.168.13.13]
        restartNext: 1
        modeZ: 0
        binaryMode: 1
        sizeCmd:
          sizeCmdInner:
            simpleCommand:
              sendCommand:
                sendingCommand: SIZE EA201504.zip
              --sendCommand
              readCommandResponse:
                replyLineQP: 213 69664768
              --readCommandResponse
            --simpleCommand
          --sizeCmdInner
        --sizeCmd
        setupDataConnection:
          active transfer mode
          setupActiveDataSocket:
            Using ephemeral port range for Active data connection.
            dataPort: 51386
            portIpAddress: 192.168.13.104
            MyIPv4: 192,168,13,104,200,186
            sendCommand:
              sendingCommand: PORT 192,168,13,104,200,186
            --sendCommand
            readCommandResponse:
              replyLineQP: 200 PORT command successful
            --readCommandResponse
          --setupActiveDataSocket
        --setupDataConnection
        sendUploadCommand:
          sendCommand:
            sendingCommand: APPE EA201504.zip
          --sendCommand
        --sendUploadCommand
        completeDataConnection:
          acceptDataConnection:
            controlChannelReply:
              Reading intermediate response..
              readCommandResponse:
                replyLineQP: 451 EA201504.zip: Append/Restart not permitted, try again
              --readCommandResponse
              Final response indicates error.
            --controlChannelReply
          --acceptDataConnection
          Failed to accept data connection.
        --completeDataConnection
        Failed to complete data connection.
      --uploadFromDataSource
      Failed.
    --uploadFromLocalFile
    TotalTime: Elapsed time: 47 millisec
    Failed.
  --PutFile
--ChilkatLog

Answer

The FTP error returned is 451. I found this online regarding that error code:

451 Failure writing to local file

This error is returned from an FTP server when it cannot store a file that is being sent to it (from SyncBackPro, SyncBackSE, or SyncBackFree). There are three possible reasons why the FTP server may return this error:

The drive (on the FTP server that the file is being stored on) is full (or there is not enough free space available for the file being sent)
The user has a limit on the amount of disk space (on the FTP server) they can use (a quota) and they've reached that limit (or will exceed it with the file being sent)
The permissions on the folder (on the FTP server) do not allow this user to store files in it

You may need to contact the administrator of the FTP server to resolve this issue.

Answer

I don't think this is the problem, because when i delete the file on the ftp server and do it again it works. Only when i try to Restart/Resume after the upload broke i get this error.

Answer

The server error message is:

451 EA201504.zip: Append/Restart not permitted, try again

My guess is that the server's FTP implementation does not support the APPE or the REST command, or is somehow configured to disallow it. I suspect you're trying in vain and there's no FTP client that can do a APPE/REST if the command is not supported by the FTP server..