Topic "WinSCP repeatedly attempts large uploads but never finishes."

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Joined: 2008-11-29
Posts: 1
Location: USA
I easily and successfully uploaded some small graphics (~1k) then tried to upload some larger zip files (~80mb). The zip file (just one) starts OK when I drag and drop, transfers at roughly 40KB/s, and counts up predictably in the operation pane. While transferring, I can see a grayed out ".pureftpd-upload..." file in the server pane. Once the file finishes, however, the progress goes from "99%" to "Connecting..." then starts over at 0. The size of that ".pureftpd-upload..." file also drops from roughtly 80mb back to roughly 1mb by the time I refresh. This has happened before with previous versions of WinSCP, but I have just used Microsoft's Powershell command-line ftp client to upload and haven't bothered reporting the problem. Interestingly, it, too, seems to fail with a "Connection timed out" unless I turn on hashing. But with hash toggled on, it works.

Environmental details:
WinSCP is the latest version as of today, 4.1.7
Client is Windows Vista Home with all updates applied.
Server is Linux CentOS and when I log in via command line, I get
"220------------ Welcome to Pure-FTPd [TLS] ----------"

I turned on logging, Debug 2. The file is large, ~800kb, so rather than paste it all here, you can get it at For ease of browsing, the following lines are landmarks:
Line 404 @ 2008-11-28 23:09:29.400, copy started
Line 6691 @ 2008-11-28 23:44:09.137, copy failed
Line 6762 @ 2008-11-28 23:44:11.859, copy restarted
Line 13110 @ 2008-11-29 00:18:42.662, copy failed again
Line 13184 @ 2008-11-29 00:18:45.318, copy restarted again
Line 13257 @ 2008-11-29 00:18:50.872, gave up and cancelled transfer
For comparison, I uploaded the 800k log file with WinSCP and logged its upload, too. It's saved at if you would like to compare the upload from the same client to the same server where the file actually sticks.

I believe this is an existing tracked bug, #157, but I couldn't figure out how to append this information to the existing tracker. I hope it's tolerable to post it here.

I like the functionality of this software and I really appreciate the donation of your time and skills to the larger community. Please let me know if there's anything else I can do to help. I can reproduce this at will, so just let me know if I can capture more details to figure it out. I'll check this forum regularly for a little while to follow up.

Mike Schmidt, "mightypile"
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Site Admin
Joined: 2002-12-10
Posts: 26858
Location: Prague, Czechia
Yes it looks similar to bug 157. Thanks for the logs. I'll check that.
Martin Prikryl

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