Completed download/upload restart itself

Hi there,

Quite often I started an upload/download, after it reaches 100%, it would wait for a moment, then restart the transfer. Already completed file is reset and start from 0 byte.

This happens to both version 3 and 4. Do you know why?

Many thanks.

Take a look at the transfer log: Double click the file in the transfer queue.

Thank you. I just tried and the log said this. Any idea how to fix please? Many thanks in advance.
The file was completed downloaded, then it restarted itself...

---

[18:55:10] Operation Begin
[18:55:10] CWD /folder
[18:55:11] 250 CWD command successful.
[18:55:11] PWD
[18:55:11] 257 "/folder" is current directory.
[18:55:11] SIZE file4.mdf
[18:55:11] 213 113442816
[18:55:11] MDTM file4.mdf
[18:55:11] 213 20090713114146
[18:55:11] STAT file4.mdf
[18:55:12] 213-status of file4.mdf:
[18:55:12] 07-13-09 07:41AM 113442816 file4.mdf
[18:55:12] 213 End of status.
[18:55:12] PASV
[18:55:12] 227 Entering Passive Mode (10,1,130,65,5,221).
[18:55:12] Opening data connection to 10.1.130.65 Port: 1501
[18:55:12] RETR file4.mdf
[18:55:13] 125 Data connection already open; Transfer starting.
[18:59:40] 113442816 bytes transferred. (413 KB/s) (00:04:27)
[19:00:41] Timeout (60s).
[19:00:41] Active Help: https://www.smartftp.com/support/kb/74
[19:00:41] Client closed the connection.
[19:00:41] Transfer failed.
[19:00:41] Operation End
[19:00:41] Operation Begin
[19:00:41] CWD /folder
[19:00:41] 250 CWD command successful.
[19:00:41] PWD
[19:00:41] 257 "/folder" is current directory.
[19:00:41] SIZE file4.mdf
[19:00:41] 213 113442816
[19:00:41] MDTM file4.mdf
[19:00:42] 213 20090713114146
[19:00:42] STAT file4.mdf
[19:00:42] 213-status of file4.mdf:
[19:00:42] 07-13-09 07:41AM 113442816 file4.mdf
[19:00:42] 213 End of status.
[19:00:42] Source File: Size=113442816, Date Modified=2009-07-13T11:41:46
[19:00:42] Destination File: Size=113442816, Date Modified=2011-08-02T08:59:40
[19:00:42] RecentTime=2011-08-02T09:00:41
[19:00:42] No rule matched. Default Action="Overwrite".
[19:00:42] PASV
[19:00:42] 227 Entering Passive Mode (10,1,130,65,6,186).
[19:00:42] Opening data connection to 10.1.130.65 Port: 1722
[19:00:42] RETR file4.mdf
[19:00:43] 125 Data connection already open; Transfer starting.
[19:05:23] 113442816 bytes transferred. (395 KB/s) (00:04:40)
[19:06:23] Timeout (60s).
[19:06:23] Active Help: https://www.smartftp.com/support/kb/74
[19:06:23] Client closed the connection.
[19:06:23] Transfer failed.
[19:06:23] Operation End
[19:06:23] Operation Begin
[19:06:23] Resolving host name "usatlsv65"
[19:06:23] Connecting to 10.1.130.65 Port: 21
[19:06:24] Connected to usatlsv65.
[19:06:24] 220 Microsoft FTP Service
[19:06:24] USER am\jhu1
[19:06:24] 331 Password required for am\jhu1.
[19:06:24] PASS (hidden)
[19:06:24] 230 User am\jhu1 logged in.
[19:06:24] SYST
[19:06:25] 215 Windows_NT
[19:06:25] Detected Server Type: Windows NT
[19:06:25] RTT: 228.598 ms
[19:06:25] FEAT
[19:06:25] 211-FEAT
[19:06:25] SIZE
[19:06:25] MDTM
[19:06:25] 211 END
[19:06:25] Detected Server Software: Microsoft IIS FTP Service
[19:06:25] TYPE I
[19:06:25] 200 Type set to I.
[19:06:25] REST 0
[19:06:26] 350 Restarting at 0.
[19:06:26] PWD
[19:06:26] 257 "/" is current directory.
[19:06:26] CWD /folder
[19:06:26] 250 CWD command successful.
[19:06:26] PWD
[19:06:26] 257 "/folder" is current directory.
[19:06:26] SIZE file4.mdf
[19:06:27] 213 113442816
[19:06:27] MDTM file4.mdf
[19:06:27] 213 20090713114146
[19:06:27] STAT file4.mdf
[19:06:27] 213-status of file4.mdf:
[19:06:28] 07-13-09 07:41AM 113442816 file4.mdf
[19:06:28] 213 End of status.
[19:06:28] Source File: Size=113442816, Date Modified=2009-07-13T11:41:46
[19:06:28] Destination File: Size=113442816, Date Modified=2011-08-02T09:05:23
[19:06:28] RecentTime=2011-08-02T09:06:23
[19:06:28] No rule matched. Default Action="Overwrite".
[19:06:28] PASV
[19:06:28] 227 Entering Passive Mode (10,1,130,65,7,98).
[19:06:28] Opening data connection to 10.1.130.65 Port: 1890
[19:06:28] RETR file4.mdf
[19:06:28] 125 Data connection already open; Transfer starting.
[19:10:04] ABOR
[19:10:04] Transfer failed.
[19:10:04] Operation End

You need to change the file exist rules in the favorite properties: Transfer->File Exist
Add another rule: If size equal then SKIP

thanks will try that.

Thank you that works. It still waits for that 60 seconds time out tho. Am happy with that if this is the only work-around? Is this a firewall issue?
Thanks.

Most likely. The control connections gets closed even though a data connection is still open.