Please attach a complete session log file both from WinSCP and CoreFTP.
Of course, I did try to reproduce the problem. But it works for me - as expected - I would be getting this problem report all the time, if it were that easy to reproduce.

martin wrote:

Did you try to the the same using another FTP client?
What you describe sounds like the server is running an antivirus scan (or something similar) on the newly uploaded files, what prevents their renaming.

Yes. When we do this exact same process with CoreFTP the problem does not occur. Have you tried the process using WinSCP to see if you get the same error?

Did you try to the the same using another FTP client?
What you describe sounds like the server is running an antivirus scan (or something similar) on the newly uploaded files, what prevents their renaming.

WinSCP version: 5.13
OS: Windows 7
Protocol: FTP
Host: GoDaddy

After creating a folder on the FTP server and transferring files into that folder, I want to rename the folder. The first time I try to rename the folder I get an error dialog and have to click "Skip". I immediately try to rename the folder again and it works. This process is repeatable with the following steps...

* Connect to FTP server
* Create new folder
* Change directory into new folder
* Transfer files into new folder
* Change directory up to parent folder
* Try to rename new folder - error dialog appears
* Click "Skip" to dismiss dialog
* Try to rename new folder again - succeeds

I have a 2 MB MP4 video that shows the entire process, but I get an error when I try to attach the file to this bug report...
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Cliff